CHANGES

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                                  Changelog

Version 7.20.0 (9 February 2010)

Daniel Stenberg (9 Feb 2010)
- When downloading compressed content over HTTP and the app asked libcurl to
  automatically uncompress it with the CURLOPT_ENCODING option, libcurl could
  wrongly provide the callback with more data than the maximum documented
  amount. An application could thus get tricked into badness if the maximum
  limit was trusted to be enforced by libcurl itself (as it is documented).

  This is further detailed and explained in the libcurl security advisory
  20100209 at

    http://curl.haxx.se/docs/adv_20100209.html

Daniel Fandrich (3 Feb 2010)
- Changed the Watcom makefiles to make them easier to keep in sync with
  Makefile.inc since that can't be included directly.

Yang Tse (2 Feb 2010)
- Symbol CURL_FORMAT_OFF_T now obsoleted, will be removed in a future release,
  symbol will not be available when building with CURL_NO_OLDIES defined. Use
  of CURL_FORMAT_CURL_OFF_T is preferred since 7.19.0

Daniel Stenberg (1 Feb 2010)
- Using the multi_socket API, it turns out at times it seemed to "forget"
  connections (which caused a hang). It turned out to be an existing (7.19.7)
  bug in libcurl (that's been around for a long time) and it happened like
  this:

  The app calls curl_multi_add_handle() to add a new easy handle, libcurl will
  then set it to timeout in 1 millisecond so libcurl will tell the app about
  it.

  The app's timeout fires off that there's a timeout, the app calls libcurl as
  we so often document it:

  do {
   res = curl_multi_socket_action(... TIMEOUT ...);
  } while(CURLM_CALL_MULTI_PERFORM == res);

  And this is the problem number one:

  When curl_multi_socket_action() is called with no specific handle, but only
  a timeout-action, it will *only* perform actions within libcurl that are
  marked to run at this time. In this case, the request would go from INIT to
  CONNECT and return CURLM_CALL_MULTI_PERFORM. When the app then calls libcurl
  again, there's no timer set for this handle so it remains in the CONNECT
  state. The CONNECT state is a transitional state in libcurl so it reports no
  sockets there, and thus libcurl never tells the app anything more about that
  easy handle/connection.

  libcurl _does_ set a 1ms timeout for the handle at the end of
  multi_runsingle() if it returns CURLM_CALL_MULTI_PERFORM, but since the loop
  is instant the new job is not ready to run at that point (and there's no
  code that makes libcurl call the app to update the timout for this new
  timeout). It will simply rely on that some other timeout will trigger later
  on or that something else will update the timeout callback. This makes the
  bug fairly hard to repeat.

  The fix made to adress this issue:

  We introduce a loop in lib/multi.c around all calls to multi_runsingle() and
  simply check for CURLM_CALL_MULTI_PERFORM internally. This has the added
  benefit that this goes in line with my long-term wishes to get rid of the
  CURLM_CALL_MULTI_PERFORM all together from the public API.

  The downside of this fix, is that the counter we return in 'running_handles'
  in several of our public functions then gets a slightly new and possibly
  confusing behavior during times:

  If an app adds a handle that fails to connect (very quickly) it may just
  as well never appear as a 'running_handle' with this fix. Previously it
  would first bump the counter only to get it decreased again at next call.
  Even I have used that change in handle counter to signal "end of a
  transfer". The only *good* way to find the end of a individual transfer
  is calling curl_multi_info_read() to see if it returns one.

  Of course, if the app previously did the looping before it checked the
  counter, it really shouldn't be any new effect.

Yang Tse (26 Jan 2010)
- Constantine Sapuntzakis' and Joshua Kwan's work done in the last four months
  relative to the asynchronous DNS lookups, along with with some integration
  adjustments I have done are finally committed to CVS.

  Currently these enhancements will benefit builds done using c-ares on any
  platform as well as Windows builds using the default threaded resolver.

  This release does not make generally available POSIX threaded DNS lookups
  yet. There is no configure option to enable this feature yet. It is possible
  to experimantally try this feature running configure with compiler flags that
  make simultaneous definition of preprocessor symbols USE_THREADS_POSIX and
  HAVE_PTHREAD_H, as well as whatever reentrancy compiler flags and linker ones
  are required to link and properly use pthread_* functions on each platform.

Daniel Stenberg (26 Jan 2010)
- Mike Crowe made libcurl return CURLE_COULDNT_RESOLVE_PROXY when it is the
  proxy that cannot be resolved when using c-ares. This matches the behaviour
  when not using c-ares.

Björn Stenberg (23 Jan 2010)
- Added a new flag: -J/--remote-header-name. This option tells the
  -O/--remote-name option to use the server-specified Content-Disposition
  filename instead of extracting a filename from the URL.

Daniel Stenberg (21 Jan 2010)
- Chris Conroy brought support for RTSP transfers, and with it comes 8(!) new
  libcurl options for controlling what to get and how to receive posssibly
  interleaved RTP data.

Daniel Stenberg (20 Jan 2010)
- As was pointed out on the http-state mailing list, the order of cookies in a
  HTTP Cookie: header _needs_ to be sorted on the path length in the cases
  where two cookies using the same name are set more than once using
  (overlapping) paths. Realizing this, identically named cookies must be
  sorted correctly. But detecting only identically named cookies and take care
  of them individually is harder than just to blindly and unconditionally sort
  all cookies based on their path lengths. All major browsers also already do
  this, so this makes our behavior one step closer to them in the cookie area.

  Test case 8 was the only one that broke due to this change and I updated it
  accordingly.

Daniel Stenberg (19 Jan 2010)
- David McCreedy brought a fix and a new test case (129) to make libcurl work
  again when downloading files over FTP using ASCII and it turns out that the
  final size of the file is not the same as the initial size the server
  reported. This is very common since servers don't take the newline
  conversions into account.

Kamil Dudka (14 Jan 2010)
- Suppressed side effect of OpenSSL configure checks, which prevented NSS from
  being properly detected under certain circumstances. It had been caused by
  strange behavior of pkg-config when handling PKG_CONFIG_LIBDIR. pkg-config
  distinguishes among empty and non-existent environment variable in that case.

Daniel Stenberg (12 Jan 2010)
- Gil Weber reported a peculiar flaw with the multi interface when doing SFTP
  transfers: curl_multi_fdset() would return -1 and not set and file
  descriptors several times during a transfer of a single file. It turned out
  to be due to two different flaws now fixed. Gil's excellent recipe helped me
  nail this.

Daniel Stenberg (11 Jan 2010)
- Made sure that the progress callback is repeatedly called at a regular
  interval even during very slow connects.

- The tests/runtests.pl script now checks to see if the test case that runs is
  present in the tests/data/Makefile.am and outputs a notice message on the
  screen if not. Each test file has to be included in that Makefile.am to get
  included in release archives and forgetting to add files there is a common
  mistake. This is an attempt to make it harder to forget.

Daniel Stenberg (9 Jan 2010)
- Johan van Selst found and fixed a OpenSSL session ref count leak:

  ossl_connect_step3() increments an SSL session handle reference counter on
  each call. When sessions are re-used this reference counter may be
  incremented many times, but it will be decremented only once when done (by
  Curl_ossl_session_free()); and the internal OpenSSL data will not be freed
  if this reference count remains positive. When a session is re-used the
  reference counter should be corrected by explicitly calling
  SSL_SESSION_free() after each consecutive SSL_get1_session() to avoid
  introducing a memory leak.

  (http://curl.haxx.se/bug/view.cgi?id=2926284)

Daniel Stenberg (7 Jan 2010)
- Make sure the progress callback is called repeatedly even during very slow
  name resolves when c-ares is used for resolving.

Claes Jakobsson (6 Jan 2010)
- Julien Chaffraix fixed so that the fragment part in an URL is not sent
  to the server anymore.

Kamil Dudka (3 Jan 2010)
- Julien Chaffraix eliminated a duplicated initialization in singlesocket().

Daniel Stenberg (2 Jan 2010)
- Make curl support --ssl and --ssl-reqd instead of the previous FTP-specific
  versions --ftp-ssl and --ftp-ssl-reqd as these options are now used to
  control SSL/TLS for IMAP, POP3 and SMTP as well in addition to FTP. The old
  option names are still working but the new ones are the ones listed and
  documented.

Daniel Stenberg (1 Jan 2010)
- Ingmar Runge enhanced libcurl's FTP engine to support the PRET command. This
  command is a special "hack" used by the drftpd server, but even though it is
  a custom extension I've deemed it fine to add to libcurl since this server
  seems to survive and people keep using it and want libcurl to support
  it. The new libcurl option is named CURLOPT_FTP_USE_PRET, and it is also
  usable from the curl tool with --ftp-pret. Using this option on a server
  that doesn't support this command will make libcurl fail.

  I added test cases 1107 and 1108 to verify the functionality.

  The PRET command is documented at
  http://www.drftpd.org/index.php/Distributed_PASV

Yang Tse (30 Dec 2009)
- Steven M. Schweda improved VMS build system, and Craig A. Berry helped
  with the patch and testing.

Daniel Stenberg (26 Dec 2009)
- Renato Botelho and Peter Pentchev brought a patch that makes the libcurl
  headers work correctly even on FreeBSD systems before v8.

  (http://curl.haxx.se/bug/view.cgi?id=2916915)

Daniel Stenberg (17 Dec 2009)
- David Byron fixed Curl_ossl_cleanup to actually call ENGINE_cleanup when
  available.
  
- Follow-up fix for the proxy fix I did for Jon Nelson's bug. It turned out I
  was a bit too quick and broke test case 1101 with that change. The order of
  some of the setups is sensitive. I now changed it slightly again to make
  sure we do them in this order:

  1 - parse URL and figure out what protocol is used in the URL
  2 - prepend protocol:// to URL if missing
  3 - parse name+password off URL, which needs to know what protocol is used
      (since only some allows for name+password in the URL)
  4 - figure out if a proxy should be used set by an option
  5 - if no proxy option, check proxy environment variables
  6 - run the protocol-specific setup function, which needs to have the proxy
      already set

Daniel Stenberg (15 Dec 2009)
- Jon Nelson found a regression that turned out to be a flaw in how libcurl
  detects and uses proxies based on the environment variables. If the proxy
  was given as an explicit option it worked, but due to the setup order
  mistake proxies would not be used fine for a few protocols when picked up
  from '[protocol]_proxy'. Obviously this broke after 7.19.4. I now also added
  test case 1106 that verifies this functionality.

  (http://curl.haxx.se/bug/view.cgi?id=2913886)

Daniel Stenberg (12 Dec 2009)
- IMAP, POP3 and SMTP support and their TLS versions (including IMAPS, POP3S
  and SMTPS) are now supported. The current state may not yet be solid, but
  the foundation is in place and the test suite has some initial support for
  these protocols. Work will now persue to make them nice libcurl citizens
  until release.

  The work with supporting these new protocols was sponsored by
  networking4all.com - thanks!

Daniel Stenberg (10 Dec 2009)
- Siegfried Gyuricsko found out that the curl manual said --retry would retry
  on FTP errors in the transient 5xx range. Transient FTP errors are in the
  4xx range. The code itself only tried on 5xx errors that occured _at login_.
  Now the retry code retries on all FTP transfer failures that ended with a
  4xx response.

  (http://curl.haxx.se/bug/view.cgi?id=2911279)

- Constantine Sapuntzakis figured out a case which would lead to libcurl
  accessing alredy freed memory and thus crash when using HTTPS (with
  OpenSSL), multi interface and the CURLOPT_DEBUGFUNCTION and a certain order
  of cleaning things up. I fixed it.

  (http://curl.haxx.se/bug/view.cgi?id=2905220)

Daniel Stenberg (7 Dec 2009)
- Martin Storsjo made libcurl use the Expect: 100-continue header for posts
  with unknown size. Previously it was only used for posts with a known size
  larger than 1024 bytes.

Daniel Stenberg (1 Dec 2009)
- If the Expect: 100-continue header has been set by the application through
  curl_easy_setopt with CURLOPT_HTTPHEADER, the library should set
  data->state.expect100header accordingly - the current code (in 7.19.7 at
  least) doesn't handle this properly. Martin Storsjo provided the fix!

Yang Tse (28 Nov 2009)
- Added Diffie-Hellman parameters to several test harness certificate files in
  PEM format. Required by several stunnel versions used by our test harness.

Daniel Stenberg (28 Nov 2009)
- Markus Koetter provided a polished and updated version of Chad Monroe's TFTP
  rework patch that now integrates TFTP properly into libcurl so that it can
  be used non-blocking with the multi interface and more. BLKSIZE also works.

  The --tftp-blksize option was added to allow setting the TFTP BLKSIZE from
  the command line.

Daniel Stenberg (26 Nov 2009)
- Extended and fixed the change I did on Dec 11 for the the progress
  meter/callback during FTP command/response sequences. It turned out it was
  really lame before and now the progress meter SHOULD get called at least
  once per second.

Daniel Stenberg (23 Nov 2009)
- Bjorn Augustsson reported a bug which made curl not report any problems even
  though it failed to write a very small download to disk (done in a single
  fwrite call). It turned out to be because fwrite() returned success, but
  there was insufficient error-checking for the fclose() call which tricked
  curl to believe things were fine.

Yang Tse (23 Nov 2009)
- David Byron modified Makefile.dist vc8 and vc9 targets in order to allow
  finer granularity control when generating src and lib makefiles.

Yang Tse (22 Nov 2009)
- I modified configure to force removal of the curlbuild.h file included in
  distribution tarballs for use by non-configure systems. As intended, this
  would get overwriten when doing in-tree builds. But VPATH builds would end
  having two curlbuild.h files, one in the source tree and another in the
  build tree. With the modification I introduced 5 Nov 2009 this could become
  an issue when running libcurl's test suite.

Daniel Stenberg (20 Nov 2009)
- Constantine Sapuntzakis identified a write after close, as the sockets were
  closed by libcurl before the SSL lib were shutdown and they may write to its
  socket. Detected to at least happen with OpenSSL builds.

- Jad Chamcham pointed out a bug with connection re-use. If a connection had
  CURLOPT_HTTPPROXYTUNNEL enabled over a proxy, a subsequent request using the
  same proxy with the tunnel option disabled would still wrongly re-use that
  previous connection and the outcome would only be badness.

Yang Tse (18 Nov 2009)
- I modified the memory tracking system to make it intolerant with zero sized
  malloc(), calloc() and realloc() function calls.

Daniel Stenberg (17 Nov 2009)
- Constantine Sapuntzakis provided another fix for the DNS cache that could
  end up with entries that wouldn't time-out:

  1. Set up a first web server that redirects (307) to a http://server:port
     that's down
  2. Have curl connect to the first web server using curl multi

  After the curl_easy_cleanup call, there will be curl dns entries hanging
  around with in_use != 0.

  (http://curl.haxx.se/bug/view.cgi?id=2891591)

- Marc Kleine-Budde fixed: curl saved the LDFLAGS set during configure into
  its pkg-config file.  So -Wl stuff ended up in the .pc file, which is really
  bad, and breaks if there are multiple -Wl in our LDFLAGS (which are in
  PTXdist). bug #2893592 (http://curl.haxx.se/bug/view.cgi?id=2893592)

Kamil Dudka (15 Nov 2009)
- David Byron improved the configure script to use pkg-config to find OpenSSL
  (and in particular the list of required libraries) even if a path is given
  as argument to --with-ssl

Yang Tse (15 Nov 2009)
- I removed enable-thread / disable-thread configure option. These were only
  placebo options. The library is always built as thread safe as possible on
  every system.

Claes Jakobsson (14 Nov 2009)
- curl-config now accepts '--configure' to see what arguments was
  passed to the configure script when building curl.

Daniel Stenberg (14 Nov 2009)
- Claes Jakobsson restored the configure functionality to detect NSS when
  --with-nss is set but not "yes".

  I think we can still improve that to check for pkg-config in that path etc,
  but at least this patch brings back the same functionality we had before.

- Camille Moncelier added support for the file type SSL_FILETYPE_ENGINE for
  the client certificate. It also disable the key name test as some engines
  can select a private key/cert automatically (When there is only one key
  and/or certificate on the hardware device used by the engine)

Yang Tse (14 Nov 2009)
- Constantine Sapuntzakis provided the fix that ensures that an SSL connection
  won't be reused unless protection level for peer and host verification match.

  I refactored how preprocessor symbol _THREAD_SAFE definition is done.

Kamil Dudka (12 Nov 2009)
- Kevin Baughman provided a fix preventing libcurl-NSS from crash on doubly
  closed NSPR descriptor. The issue was hard to find, reported several times
  before and always closed unresolved. More info at the RH bug:
  https://bugzilla.redhat.com/534176

- libcurl-NSS now tries to reconnect with TLS disabled in case it detects
  a broken TLS server. However it does not happen if SSL version is selected
  manually. The approach was originally taken from PSM. Kaspar Brand helped me
  to complete the patch. Original bug reports:
  https://bugzilla.redhat.com/525496
  https://bugzilla.redhat.com/527771

Yang Tse (12 Nov 2009)
- I modified configure script to make the getaddrinfo function check also
  verify if the function is thread safe.

Yang Tse (11 Nov 2009)
- Marco Maggi reported that compilation failed when configured --with-gssapi
  and GNU GSS installed due to a missing mutual exclusion of header files in
  the Kerberos 5 code path. He also verified that my patch worked for him.

Daniel Stenberg (11 Nov 2009)
- Constantine Sapuntzakis posted bug #2891595
  (http://curl.haxx.se/bug/view.cgi?id=2891595) which identified how an entry
  in the DNS cache would linger too long if the request that added it was in
  use that long. He also provided the patch that now makes libcurl capable of
  still doing a request while the DNS hash entry may get timed out.
  
- Christian Schmitz noticed that the progress meter/callback was not properly
  used during the FTP connection phase (after the actual TCP connect), while
  it of course should be. I also made the speed check get called correctly so
  that really slow servers will trigger that properly too.

Kamil Dudka (5 Nov 2009)
- Dropped misleading timeouts in libcurl-NSS and made sure the SSL socket works
  in non-blocking mode.

Yang Tse (5 Nov 2009)
- I removed leading 'curl' path on the 'curlbuild.h' include statement in
  curl.h, adjusting auto-makefiles include path, to enhance portability to
  OS's without an orthogonal directory tree structure such as OS/400.

Daniel Stenberg (4 Nov 2009)
- I fixed several problems with the transfer progress meter. It showed the
  wrong percentage for small files, most notable for <1000 bytes and could
  easily end up showing more than 100% at the end. It also didn't show any
  percentage, transfer size or estimated transfer times when transferring
  less than 100 bytes.

Version 7.19.7 (4 November 2009)

Daniel Stenberg (2 Nov 2009)
- As reported independent by both Stan van de Burgt and Didier Brisebourg,
  CURLINFO_SIZE_DOWNLOAD (the -w variable size_download) didn't work when
  getting data from ldap!

Daniel Stenberg (31 Oct 2009)
- Gabriel Kuri reported a problem with CURLINFO_CONTENT_LENGTH_DOWNLOAD if the
  download was 0 bytes, as libcurl would then return the size as unknown (-1)
  and not 0. I wrote a fix and test case 566 to verify it.

Daniel Stenberg (30 Oct 2009)
- Liza Alenchery mentioned a problem with re-used SCP connection when a bad
  auth is used, as it caused a crash. I failed to repeat the issue, but still
  made a change that now forces the TCP connection used for a freed SCP
  session to get closed and not be re-used.

- "Tom" posted a bug report that mentioned how libcurl did wrong when doing a
  POST using a read callback, with Digest authentication and
  "Transfer-Encoding: chunked" enforced.  I would then cause the first request
  to be wrongly sent and then basically hang until the server closed the
  connection. I fixed the problem and added test case 565 to verify it.

Daniel Stenberg (25 Oct 2009)
- Dima Barsky made the curl cookie parser accept cookies even with blank or
  unparsable expiry dates and then treat them as session cookies - previously
  libcurl would reject cookies with a date format it couldn't parse. Research
  shows that the major browser treat such cookies as session cookies. I
  modified test 8 and 31 to verify this.

Daniel Stenberg (21 Oct 2009)
- Attempt to use pkg-config for finding out libssh2 installation details
  during configure.

- A patch in bug report #2883177 (http://curl.haxx.se/bug/view.cgi?id=2883177)
  by Johan van Selst introduced the --crlfile option to curl, which makes curl
  tell libcurl about a file with CRL (certificate revocation list) data to
  read.

Daniel Stenberg (18 Oct 2009)
- Ray Dassen provided a patch in Debian's bug tracker (bug number #551461)
  that now makes curl_getdate(3) actually handles RFC 822 formatted dates that
  use the "single letter military timezones".
  http://www.rfc-ref.org/RFC-TEXTS/822/chapter5.html has the details.

- Fixed memory leak in the SCP/SFTP code as it never freed the knownhosts
  data!

- John Dennis filed bug report #2873666
  (http://curl.haxx.se/bug/view.cgi?id=2873666) which identified a problem
  which made libcurl loop infinitely when given incorrect credentials when
  using HTTP GSS negotiate authentication. He also provided a small and simple
  patch for it.

- Kevin Baughman found a double close() problem with libcurl-NSS, as when
  libcurl called NSS to close the SSL "session" it also closed the actual
  socket.

Yang Tse (17 Oct 2009)
- Bug report #2866724 indicated
  (http://curl.haxx.se/bug/view.cgi?id=2866724) that curl on Windows failed
  when writing files whose file names originally contained characters which
  are not valid for file names on Windows. Dan Fandrich provided an initial
  patch and another revised one to fix this issue.

Daniel Stenberg (1 Oct 2009)
- Tom Mueller correctly reported in bug report #2870221
  (http://curl.haxx.se/bug/view.cgi?id=2870221) that libcurl returned an
  incorrect return code from the internal trynextip() function which caused
  him grief. This is a regression that was introduced in 7.19.1 and I find it
  strange it hasn't hit us harder, but I won't persue into figuring out
  exactly why.
 
- Constantine Sapuntzakis: The current implementation will always set
  SO_SNDBUF to CURL_WRITE_SIZE even if the SO_SNDBUF starts out larger.  The
  patch doesn't do a setsockopt if SO_SNDBUF is already greater than
  CURL_WRITE_SIZE. This should help folks who have set up their computer with
  large send buffers.

Daniel Stenberg (27 Sep 2009)
- I introduced a maximum limit for received HTTP headers. It is controlled by
  the define CURL_MAX_HTTP_HEADER which is even exposed in the public header
  file to allow for users to fairly easy rebuild libcurl with a modified
  limit. The rationale for a fixed limit is that libcurl is realloc()ing a
  buffer to be able to put a full header into it, so that it can call the
  header callback with the entire header, but that also risk getting it into
  trouble if a server by mistake or willingly sends a header that is more or
  less without an end. The limit is set to 100K.

Daniel Stenberg (26 Sep 2009)
- John P. McCaskey posted a bug report that showed how libcurl did wrong when
  saving received cookies with no given path, if the path in the request had a
  query part. That is means a question mark (?) and characters on the right
  side of that. I wrote test case 1105 and fixed this problem.

Kamil Dudka (26 Sep 2009)
- Implemented a protocol independent way to specify blocking direction, used by
  transfer.c for blocking. It is currently used only by SCP and SFTP protocols.
  This enhancement resolves an issue with 100% CPU usage during SFTP upload,
  reported by Vourhey.

Daniel Stenberg (25 Sep 2009)
- Chris Mumford filed bug report #2861587
  (http://curl.haxx.se/bug/view.cgi?id=2861587) identifying that libcurl used
  the OpenSSL function X509_load_crl_file() wrongly and failed if it would
  load a CRL file with more than one certificate within. This is now fixed.
  
Daniel Stenberg (16 Sep 2009)
- Sven Anders reported that we introduced a cert verfication flaw for OpenSSL-
  powered libcurl in 7.19.6. If there was a X509v3 Subject Alternative Name
  field in the certficate it had to match and so even if non-DNS and non-IP
  entry was present it caused the verification to fail.

Daniel Fandrich (15 Sep 2009)
- Moved the libssh2 checks after the SSL library checks. This helps when
  statically linking since libssh2 needs the SSL library link flags to be
  set up already to satisfy its dependencies. This wouldn't be necessary if
  the libssh2 configure check was changed to use pkg-config since the
  --static flag would add the dependencies automatically.

Yang Tse (14 Sep 2009)
- Revert Joshua Kwan's patch committed 11 Sep 2009.

  Some systems poll function sets POLLHUP in revents without setting
  POLLIN, and sets POLLERR without setting POLLIN and POLLOUT. In some
  libcurl code execution paths this could trigger busy wait loops with
  high CPU usage until a timeout condition aborted the loop.

  The reverted patch addressed the above issue for a very specific case,
  when awaiting c-ares to resolve. A libcurl-wide fix for Curl_poll now
  superceeds this one.

Guenter Knauf (11 Sep 2009)
- Joshua Kwan provided a patch to pass POLLERR / POLLHUP back to c-ares.
  This fixes a loop problem with high CPU usage.

Daniel Stenberg (10 Sep 2009)
- Claes Jakobsson fixed a problem with cookie expiry dates at exctly the epoch
  start second "Thu Jan 1 00:00:00 GMT 1970" as the date parser then returns 0
  which internally then is treated as a session cookie. That particular date
  is now made to get the value of 1.

Daniel Stenberg (2 Sep 2009)
- Daniel Johnson found a flaw in the code converting sftp-errors to libcurl
  errors.

Daniel Stenberg (1 Sep 2009)
- Peter Sylvester made a debug feature for Curl_resolv() that now will force
  libcurl to resolve 'localhost' whatever name you use in the URL *if* you set
  the --interface option to (exactly) "LocalHost". This will enable us to
  write tests for custom hosts names but still use a local host server.

- configure now tries to use pkg-config for a number of sub-dependencies even
  when cross-compiling. The key to success is then you properly setup
  PKG_CONFIG_PATH before invoking configure.

  I also improved how NSS is detected by trying nss-config if pkg-config isn't
  present, and as a last resort just use the lib name and force the user to
  setup the LIBS/LDFLAGS/CFLAGS etc properly. The previous last resort would
  add a range of various libs that would almost never be quite correct.

Daniel Stenberg (31 Aug 2009)
- When using the multi interface with FTP and you asked for NOBODY, you did no
  QUOTE commands and the request used the same path as the connection had
  already changed to, it would decide that no commands would be necessary for
  the "DO" action and that was not handled properly but libcurl would instead
  hang.

Kamil Dudka (28 Aug 2009)
- Improved error message for not matching certificate subject name in
  libcurl-NSS. Originally reported at:
  https://bugzilla.redhat.com/show_bug.cgi?id=516056#c9

Patrick Monnerat (24 Aug 2009)
- Introduced a SYST-based test to properly set-up name format when dealing
  with the OS/400 FTP server.

- Fixed an ftp_readresp() bug preventing detection of failing control socket
  and causing FTP client to loop forever.

Daniel Stenberg (24 Aug 2009)
- Marc de Bruin pointed out that configure --with-gnutls=PATH didn't work
  properly and provided a fix. http://curl.haxx.se/bug/view.cgi?id=2843008

- Eric Wong introduced support for the new option -T. (dot) that makes curl
  read stdin in a non-blocking fashion. This also brings back -T- (minus) to
  the previous blocking behavior since it could break stuff for people at
  times.

Michal Marek (21 Aug 2009)
- With CURLOPT_PROXY_TRANSFER_MODE, avoid sending invalid URLs like
  ftp://example.com;type=i if the user specified ftp://example.com without the
  slash.

Daniel Stenberg (21 Aug 2009)
- Andre Guibert de Bruet pointed out a missing return code check for a
  strdup() that could lead to segfault if it returned NULL. I extended his
  suggest patch to now have Curl_retry_request() return a regular return code
  and better check that.

- Lots of good work by Krister Johansen, mostly related to pipelining:

  Fix SIGSEGV on free'd easy_conn when pipe unexpectedly breaks
  Fix data corruption issue with re-connected transfers
  Fix use after free if we're completed but easy_conn not NULL

Kamil Dudka (13 Aug 2009)
- Changed NSS code to not ignore the value of ssl.verifyhost and produce more
  verbose error messages. Originally reported at:
  https://bugzilla.redhat.com/show_bug.cgi?id=516056

Daniel Stenberg (12 Aug 2009)
- Karl Moerder fixed the Makefile.vc* makefiles to include the new file
  nonblock.c so that they work fine again

- I expanded test 517 with a bunch of more dates that originate from the
  Chrome browser test suite. It turns out most of them get parsed the same
  way.

Version 7.19.6 (12 August 2009)

Daniel Stenberg (12 Aug 2009)
- Carsten Lange reported a bug and provided a patch for TFTP upload and the
  sending of the TSIZE option. I don't like fixing bugs just hours before
  a release, but since it was broken and the patch fixes this for him I decided
  to get it in anyway.

Daniel Stenberg (11 Aug 2009)
- Peter Sylvester made the HTTPS test server use specific certificates for
  each test, so that the test suite can now be used to actually test the
  verification of cert names etc. This made an error show up in the OpenSSL-
  specific code where it would attempt to match the CN field even if a
  subjectAltName exists that doesn't match. This is now fixed and verified
  in test 311.

- Benbuck Nason posted the bug report #2835196
  (http://curl.haxx.se/bug/view.cgi?id=2835196), fixing a few compiler
  warnings when mixing ints and bools.

Daniel Fandrich (10 Aug 2009)
- Fixed a memory leak in the FTP code and an off-by-one heap buffer overflow.

Daniel Fandrich (9 Aug 2009)
- Fixed some memory leaks in the command-line tool that caused most of the
  torture tests to fail.

Daniel Stenberg (2 Aug 2009)
- Curt Bogmine reported a problem with SNI enabled on a particular server. We
  should introduce an option to disable SNI, but as we're in feature freeze
  now I've addressed the obvious bug here (pointed out by Peter Sylvester): we
  shouldn't try to enable SNI when SSLv2 or SSLv3 is explicitly selected.
  Code for OpenSSL and GnuTLS was fixed. NSS doesn't seem to have a particular
  option for SNI, or are we simply not using it?

Daniel Stenberg (1 Aug 2009)
- Scott Cantor posted the bug report #2829955
  (http://curl.haxx.se/bug/view.cgi?id=2829955) mentioning the recent SSL cert
  verification flaw found and exploited by Moxie Marlinspike. The presentation
  he did at Black Hat is available here:
  https://www.blackhat.com/html/bh-usa-09/bh-usa-09-archives.html#Marlinspike

  Apparently at least one CA allowed a subjectAltName or CN that contain a
  zero byte, and thus clients that assumed they would never have zero bytes
  were exploited to OK a certificate that didn't actually match the site. Like
  if the name in the cert was "example.com\0theatualsite.com", libcurl would
  happily verify that cert for example.com.

  libcurl now better uses the length of the extracted name, not using the zero
  termination for getting the string length.

  This fixing only made and needed in OpenSSL interfacing code.

- Tanguy Fautre pointed out that OpenSSL's function RAND_screen() (present
  only in some OpenSSL installs - like on Windows) isn't thread-safe and we
  agreed that moving it to the global_init() function is a decent way to deal
  with this situation.

- Alexander Beedie provided the patch for a noproxy problem: If I have set
  CURLOPT_NOPROXY to "*", or to a host that should not use a proxy, I actually
  could still end up using a proxy if a proxy environment variable was set.

Daniel Stenberg (27 Jul 2009)
- All the quote options (CURLOPT_QUOTE, CURLOPT_POSTQUOTE and
  CURLOPT_PREQUOTE) now accept a preceeding asterisk before the command to
  send when using FTP, as a sign that libcurl shall simply ignore the response
  from the server instead of treating it as an error. Not treating a 400+ FTP
  response code as an error means that failed commands will not abort the
  chain of commands, nor will they cause the connection to get disconnected.

Daniel Stenberg (26 Jul 2009)
- Johan van Selst posted bug report #2825989
  (http://curl.haxx.se/bug/view.cgi?id=2825989) pointing out that
  OpenSSL-powered libcurl didn't support the SHA-2 digest algorithm, and
  provided the solution too: to use OpenSSL_add_all_algorithms() in addition
  to the older SSLeay_* alternative. OpenSSL_add_all_algorithms was added in
  OpenSSL 0.9.5

Daniel Stenberg (23 Jul 2009)
- Added CURLOPT_SSH_KNOWNHOSTS, CURLOPT_SSH_KEYFUNCTION, CURLOPT_SSH_KEYDATA.
  They introduce known_host support for SSH keys to libcurl. See docs for
  details. Note that this feature depends on a new enough libssh2 version, to
  be supported in libssh2 1.2 and later (or current git repo at this time).

Michal Marek (22 Jul 2009)
- David Binderman found a memory and fd leak in lib/gtls.c:load_file()
  (https://bugzilla.novell.com/523919). When looking at the code, I found that
  also the ptr pointer can leak.

Kamil Dudka (20 Jul 2009)
- Claes Jakobsson improved the support for client certificates handling in
  NSS-powered libcurl. Now the client certificates can be selected
  automatically by a NSS built-in hook. Additionally pre-login to all PKCS11
  slots is no more performed. It used to cause problems with HW tokens.

- Fixed reference counting for NSS client certificates. Now the PEM reader
  module should be always properly unloaded on Curl_nss_cleanup(). If the
  unload fails though, libcurl will try to reuse the already loaded instance.

Daniel Fandrich (15 Jul 2009)
- Added nonblock.c to the non-automake makefiles (note that the dependencies
  in the Watcom makefiles aren't quite correct).

Michal Marek (15 Jul 2009)
- Changed the description of CURLINFO_OS_ERRNO to make it clear that the
  errno is not reset on success.

Guenter Knauf (14 Jul 2009)
- renamed generated config.h to curl_config.h to avoid any future clashes
  with config.h from other projects.
  
Daniel Stenberg (9 Jul 2009)
- Eric Wong introduced curlx_nonblock() that the curl tool now (re-)uses for
  setting a file descriptor non-blocking. Used by the functionality Eric
  himself brough on June 15th.

Daniel Stenberg (8 Jul 2009)
- Constantine Sapuntzakis posted bug report #2813123
  (http://curl.haxx.se/bug/view.cgi?id=2813123) and an a patch that fixes the
  problem:

  Url A is accessed using auth. Url A redirects to Url B (on a different
  server0. Url B reuses a persistent connection. Url B has auth, even though
  it's on a different server.

  Note: if Url B does not reuse a persistent connection, auth is not sent.

  reason:

  data->state.first_host is not initialized becuase Curl_http_connect is not
  called when a connection is reused.

  Solution:

  move initialization of data->state.first_host to Curl_http. No code before
  Curl_http uses data->state.first_host anyway.

Guenter Knauf (4 Jul 2009)
- Markus Koetter provided a patch to avoid getnameinfo() usage which broke a
  couple of both IPv4 and IPv6 autobuilds.

Daniel Stenberg (29 Jun 2009)
- Markus Koetter made CURLOPT_FTPPORT (and curl's -P/--ftpport) support a port
  range if given colon-separated after the host name/address part. Like
  "192.168.0.1:2000-10000"

- Modified the separators used for CURLOPT_CERTINFO in multi-part outputs. I
  don't know how they got wrong in the first place, but using this output
  format makes it possible to quite easily separate the string into an array
  of multiple items.

Daniel Fandrich (16 June 2009)
- Added a few more compiler warning options for gcc.

Daniel Stenberg (16 Jun 2009)
- Reuven Wachtfogel made curl -o - properly produce a binary output on windows
  (no newline translations). Use -B/--use-ascii if you rather get the ascii
  approach.

Michal Marek (16 Jun 2009)
- When doing non-anonymous ftp via http proxies and the password is not
  provided in the url, add it there (squid needs this).

Daniel Stenberg (15 Jun 2009)
- Eric Wong's patch:

  This allows curl(1) to be used as a client-side tunnel for arbitrary stream
  protocols by abusing chunked transfer encoding in both the HTTP request and
  HTTP response.  This requires server support for sending a response while a
  request is still being read, of course.

  If attempting to read from stdin returns EAGAIN, then we pause our sender.
  This leaves curl to attempt to read from the socket while reading from stdin
  (and thus sending) is paused.

  This change was needed to allow successfully tunneling the git protocol over
  HTTP (--no-buffer is needed, as well).

Patrick Monnerat (15 Jun 2009)
- Replaced use of standard C library rand()/srand() by our own pseudo-random
  number generator.

Yang Tse (11 Jun 2009)
- I adapted testcurl script to allow building test harness programs when
  cross-compiling for a *-*-mingw* host.

Daniel Stenberg (10 Jun 2009)
- Fabian Keil ran clang on the (lib)curl code, found a bunch of warnings and
  contributed a range of patches to fix them.

Yang Tse (10 Jun 2009)
- I introduced configure script option --enable-curldebug which now allows
  the decoupled enabling or disabling of the curl debug memory tracking
  feature from the --enable-debug option which no longer controls this.

  curl --version will list 'Debug' feature for debug enabled builds, and
  will list 'TrackMemory' feature for curl debug memory tracking capable
  builds. These features are independent and can be controlled when running
  the configure script. When --enable-debug is given both features will be
  enabled, unless some restriction prevents memory tracking from being used.

  Internally, definition of preprocessor symbol DEBUGBUILD restricts code
  which is only compiled for debug enabled builds. And symbol CURLDEBUG is
  used to differentiate code which is _only_ used for memory tracking.

Yang Tse (9 Jun 2009)
- Daniel Steinberg pointed out that Curl_FormInit() in formdata.c was not
  initializing the fread callback pointer and this triggered a compiler
  warning, also provided a friendly suggestion on how to fix it.

Daniel Stenberg (8 Jun 2009)
- Claes Jakobsson provided a patch for libcurl-NSS that fixed a bad refcount
  issue with client certs that caused issues like segfaults.
  http://curl.haxx.se/mail/lib-2009-05/0316.html

- Triggered by bug report #2798852 and the patch in there, I fixed configure
  to detect gnutls build options with pkg-config only and not libgnutls-config
  anymore since GnuTLS has stopped distributing that tool. If an explicit path
  is given to configure, we will instead guess on how to link and use that
  lib. I did not use the patch from the bug report.

Yang Tse (8 Jun 2009)
- Igor Novoseltsev adjusted Makefile.vxworks to get sources and headers
  included from Makefile.inc, and provided docs\INSTALL VxWorks section.

- I removed buildconf.bat from release and daily snapshot archives. This
  file is only for CVS tree checkout builds.

Daniel Stenberg (8 Jun 2009)
- Eric Wong fixed --no-buffer to actually switch off output buffering. Been
  broken since 7.19.0

Bill Hoffman (6 Jun 2009)
- Added some cmake docs and fixed socklen_t in the build.

Yang Tse (5 Jun 2009)
- John E. Malmberg provided VMS specific patch: "This fixes an existing bug
  in urlglob.c where it was not converting the Curl Unix exit code to a VMS
  DCL compatible exit code.  This fix required the enhancement described next.
  This also adds an enhancement to main.c so that when curl is run under a
  Unix shell like Bash on VMS, it will return the standard Unix exit codes
  and messages." And another patch for docs/examples.

  I introduced os-specific.c and os-specific.h for use in curl tool code
  and adjusted John E. Malmberg's patch placement to use these new files
  as an effort to prevent main.c from growing ad infinitum. Code already
  existing in main.c which is OS specific should be moved into these files.

Daniel Stenberg (4 June 2009)
- Setting the Content-Length: header from your app when you do a POST or PUT
  is almost always a VERY BAD IDEA. Yet there are still apps out there doing
  this, and now recently it triggered a bug/side-effect in libcurl as when
  libcurl sends a POST or PUT with NTLM, it sends an empty post first when it
  knows it will just get a 401/407 back. If the app then replaced the
  Content-Length header, it caused the server to wait for input that libcurl
  wouldn't send. Aaron Oneal reported this problem in bug report #2799008
  (http://curl.haxx.se/bug/view.cgi?id=2799008) and helped us verify the fix.

Yang Tse (4 Jun 2009)
- Igor Novoseltsev provided patches and information, that after some
  adjustments to better fit curl's way of doing things, have resulted
  in the posibility of building libcurl for VxWorks.

Daniel Fandrich (2 June 2009)
- Checked in a Google Android make file. To use it, you must first
  create a config.h file by running configure in the Android environment,
  which doesn't seem to be easy to do. If no easy way can be found, a
  static config-android.h may need to be created and checked in to the
  libcurl source tree.

Daniel Stenberg (1 June 2009)
- Claes Jakobsson fixed the configure script to better find and use NSS
  without pkg-config.

Yang Tse (1 Jun 2009)
- John E. Malmberg provided a VMS specific clean-up for curl.h, and pointed
  out that the configure script was failing to detect the timeval struct on
  VMS when building with _XOPEN_SOURCE_EXTENDED undefined due to definition
  taking place in socket.h instead of time.h.  I have adjusted configure
  script to also include this header when checking struct timeval.

Daniel Stenberg (27 May 2009)
- Frank McGeough provided a small OpenSSL #include fix to make libcurl compile
  fine with Nokia 5th edition 1.0 SDK for Symbian.

- Andre Guibert de Bruet found a call to a OpenSSL function that didn't check
  for a failure properly.

- Mike Crowe pointed out that setting CURLOPT_USERPWD to NULL used to clear
  the auth credentials back in 7.19.0 and earlier while now you have to set ""
  to get the same effect. His patch brings back the ability to use NULL.

- Claes Jakobsson fixed libcurl-NSS to build fine even without the
  PK11_CreateGenericObject() function.

Daniel Stenberg (25 May 2009)
- bug report #2796358 (http://curl.haxx.se/bug/view.cgi?id=2796358) pointed
  out that the cookie parser would leak memory when it parses cookies that are
  received with domain, path etc set multiple times in the same header. While
  such a cookie is questionable, they occur in the wild and libcurl no longer
  leaks memory for them. I added such a header to test case 8.

Daniel Fandrich (22 May 2009)
- Removed some obsolete digest code that caused a valgrind error in test 551.

Daniel Fandrich (20 May 2009)
- Added "non-existing host" test keywords to make it easy to skip those
  tests on machines that have broken DNS configurations (such as
  those configured to use OpenDNS).

Daniel Stenberg (19 May 2009)
- Kamil Dudka brought the patch from the Redhat bug entry
  https://bugzilla.redhat.com/show_bug.cgi?id=427966 which was libcurl closing
  a bad file descriptor when closing down the FTP data connection.  Caolan
  McNamara seems to be the original author of it.

Version 7.19.5 (18 May 2009)

Daniel Stenberg (17 May 2009)
- James Bursa posted a patch to the mailing list that fixed a problem with
  no_proxy which made it not skip the proxy if the URL entered contained a
  user name. I added test case 1101 to verify.

Daniel Stenberg (11 May 2009)
- Balint Szilakszi reported a memory leak when libcurl did gzip decompression
  of streams that had some parts (legitimately) missing. We now provide and use
  a proper cleanup function for the content encoding submodule.
  http://curl.haxx.se/mail/lib-2009-05/0092.html

- Kamil Dudka provided a fix for libcurl-NSS reported by Michael Cronenworth
  at https://bugzilla.redhat.com/show_bug.cgi?id=453612#c12

  If an incorrect password is given while loading a private key, libcurl ends
  up in an infinite loop consuming memory. The bug is critical.

- I fixed the problem with doing NTLM, POST and then following a 302 redirect,
  as reported by Ebenezer Ikonne (on curl-users) and Laurent Rabret (on
  curl-library). The transfer was mistakenly marked to get more data to send
  but since it didn't actually have that, it just hung there...

Daniel Stenberg (10 May 2009)
- Andre Guibert de Bruet correctly pointed out an over-alloc with one wasted
  byte in the digest code.

Yang Tse (9 May 2009)
- Removed DOS and TPF package's subdirectory Makefile.am, it was only used
  to include some files in the distribution tarball serving no other purpose.