Some functions using getaddrinfo and gethostbyname were still
mistakingly being used/linked even if c-ares was selected as resolver
backend.

Reported by: Arthur Murray
Bug: http://curl.haxx.se/mail/lib-2012-01/0160.html

Test 161 updated accordingly

Previously the code would create a dummy socket while resolving just to
have curl_multi_fdset() return something but the non-win32 version
doesn't do it this way and the creation and use of a socket that isn't
made with the common create-socket callback can be confusing to apps
using the multi_socket API etc.

This change removes the dummy socket and thus will cause
curl_multi_fdset() to return with maxfd == -1 more often.

With this change, curl compiles with the new OPENSSL_NO_SSL_INTERN
cflag. This flag might become the default in some distant future.

Fixed a problem in POP3 and IMAP where a connection would fail when
CURLUSESSL_TRY was specified for a server that didn't support
SSL/TLS connections rather than continuing.

The STARTTLS response code in SMTP, POP3 and IMAP would return
CURLE_LOGIN_DENIED rather than CURLE_USE_SSL_FAILED when SSL/TLS
was not available on the server.

Reported by: Gokhan Sengun
Bug: http://curl.haxx.se/mail/lib-2012-01/0018.html

Unfortunately we have no test cases for this and I have no SSPI build or
server to verify this with. The change seems simple enough though.

Bug: http://curl.haxx.se/bug/view.cgi?id=3466497
Reported by: Patrice Guerin

When the buffer gets realloced to hold the file name in the
SSH_SFTP_READDIR_LINK state, the counter was not bumped accordingly.

Reported by: Armel Asselin
Patch by: Armel Asselin
Bug: http://curl.haxx.se/mail/lib-2011-12/0249.html

... to make sure the DNS cache is properly case insensitive

When a HTTP connection is re-used for a subsequent request without
proxy, it would always re-use the Host: header of the first request. As
host names are case insensitive it would make curl send another host
name case that what the particular request used.

Now it will instead always use the most recent host name to always use
the desired casing.

Added test case 1318 to verify.

Bug: http://curl.haxx.se/mail/lib-2011-12/0314.html
Reported by: Alex Vinnik

The load host names to DNS cache function was moved to hostip.c and it
now makes sure to not add host names that already are present in the
cache. It would previously lead to memory leaks when for example using
the --resolve and multiple URLs on the command line.

The commit 9dd85bce unintentionally changed the way we compute the time
spent waiting for 100-continue.  In particular, when using a SSL client
certificate, the time spent by SSL handshake was included and could
cause the CURL_TIMEOUT_EXPECT_100 timeout to be mistakenly fired up.

Bug: https://bugzilla.redhat.com/767490
Reported by: Mamoru Tasaka

ftp_do_more() returns after accepting the server connect however it
needs to fall through and set "*complete" to TRUE before exit from the
function.

Bug: http://curl.haxx.se/mail/lib-2011-12/0250.html
Reported by: Gokhan Sengun

In the recent do_more fix the new logic was mistakenly checking the
pointer instead of what it points to.

Reported by: Gokhan Sengun
Bug: http://curl.haxx.se/mail/lib-2011-12/0250.html

When sending quote command to a SFTP server and 'mkdir' was used, it
would send fixed permissions and not use the CURLOPT_NEW_DIRECTORY_PERMS
as it should.

Reported by: Armel
Patch by: Armel
Bug: http://curl.haxx.se/mail/lib-2011-12/0249.html

CURLOPT_RESOLVE populates the DNS cache with entries that are marked as
eternally in use. Those entries need to be taken care of when the cache
is killed off.

Bug: http://curl.haxx.se/bug/view.cgi?id=3463121
Reported by: "tw84452852"

This function was introduced in commit 5527417a and as pointed out
by Gokhan Sengun, the array with poll structs must large enough to hold
3 sockets since that is what the function can accept. It could be noted
that he had this fixed in his patch as posted in
http://curl.haxx.se/mail/lib-2011-12/0179.html

Bug: http://curl.haxx.se/mail/lib-2011-12/0228.html
Reported by: Gokhan Sengun

First off the timeout for accepting a server connect back must of course
respect a global timeout. Then the timeleft function is only used by ftp
code so it was moved to ftp.c and made static.

"wait_data_conn" was added to the connectionbits in commit c834213a for
handling active FTP connections but as it is purely FTP specific and now
only ever accessed by ftp.c I moved it into the FTP connection struct.

Backpedaled out the funny double-change of state in the multi state
machine by adding a new argument to the do_more() function to signal
completion. This way it can remain in the DO_MORE state properly until
done. Long term, the entire DO_MORE logic should be moved into the FTP
code and be hidden from the multi code as the logic is only used for
FTP.

1- Two new error codes are introduced.

CURLE_FTP_ACCEPT_FAILED to be set whenever ACCEPTing fails because of
FTP server connected.

CURLE_FTP_ACCEPT_TIMEOUT to be set whenever ACCEPTing timeouts.

Neither of these errors are considered fatal and control connection
remains OK because it could just be a firewall blocking server to
connect to the client.

2- One new setopt option was introduced.

CURLOPT_ACCEPTTIMEOUT_MS

It sets the maximum amount of time FTP client is going to wait for a
server to connect. Internal default accept timeout is 60 seconds.

This offers an alternative to the existing Curl_socket_ready() API which
only checks one socket for read and one for write.

It makes it easier to introduce debug outputs in this function, and
everything in the function is using the value anyway so it might even be
more efficient.

Regression introduced in 7.23.0 with commit 9dd85bce. The function in
which the PRETRANSFER time stamp was recorded was moved in time causing
it be stored very quickly after the start timestamp. On most systems
shorter than 1 millisecond and thus it wouldn't even show with -w
"%{time_pretransfer}" using the command line tool.

Bug: http://curl.haxx.se/mail/archive-2011-12/0022.html
Reported by: Toni Moreno

Allow, at configure time, the production of versioned symbols. The
symbols will look like "CURL_<FLAVOUR>_<VERSION> <SYMBOL>", where
<FLAVOUR> represents the SSL flavour (e.g. OPENSSL, GNUTLS, NSS, ...),
<VERSION> is the major SONAME version and <SYMBOL> is the actual symbol
name. If no SSL library is enabled the symbols will be just
"CURL_<VERSION> <SYMBOL>".

This gets the appconnect time right for ssl backends, which don't
support non-blocking connects.

Signed-off-by: Sven Wegener <sven.wegener@stealer.net>