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.

  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.

  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.

for Win32 and Symbian unless CARES_STATICLIB is defined to use static
library linkage.

false positive on a leaked socket, so this introduces a way to tell the system
that the socket is indeed closed without explicitly closing it!

  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.

fail to build when this happens, and show an appropriate error.

The brave of heart can circumvect this. Defining ALLOW_MSVC6_WITHOUT_PSDK
in lib/config-win32.h, although absolutely discouraged and unsupported,
this will allow the die hard MSVC hacker to build in such a discouraged
environment.

The actually supported 'fix' is to install 'February 2003 Platform SDK'
a.k.a. 'Windows Server 2003 PSDK' which can be freely downloaded from
http://www.microsoft.com/msdownload/platformsdk/sdkupdate/psdk-full.htm

  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.

Check for basename() is now done the same as other function checks

  data!

(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.

  libcurl called NSS to close the SSL "session" it also closed the actual
  socket.

else ASN1_STRING_to_UTF8() returns the string length.

  (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.

  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.

  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.

  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.

  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.

  (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.