Functions renamed:

Curl_output_ntlm_sso -> Curl_output_ntlm_wb
sso_ntlm_close -> wb_ntlm_close
sso_ntlm_response -> wb_ntlm_response
sso_ntlm_initiate -> wb_ntlm_initiate

Preprocessor symbols renamed:

CURLAUTH_NTLM_SSO -> CURLAUTH_NTLM_WB
CURL_VERSION_NTLM_SSO -> CURL_VERSION_NTLM_WB

Output of Curl_ntlm_create_type1_message() and Curl_ntlm_create_type3_message()
functions is now already base64 encoded.

include the prototype header

Fixed the order of the preferred SMTP authentication method to:
AUTH CRAM-MD5, AUTH LOGIN then AUTH PLAIN.

AUTH PLAIN should be the last as it slightly more insecure than AUTH LOGIN
as the username and password are sent together - there is no handshaking
between the client and server like there is with AUTH LOGIN.

Previous interfaces for these libcurl internal functions did not allow to tell
apart a legitimate zero size result from an error condition. These functions
now return a CURLcode indicating function success or otherwise specific error.
Output size is returned using a pointer argument.

All usage of these two functions, and others closely related, has been adapted
to the new interfaces. Relative error and OOM handling adapted or added where
missing. Unit test 1302 also adapted.

* Added function comments:
    - Curl_ntlm_decode_type2_message
    - Curl_ntlm_create_type1_message
    - Curl_ntlm_create_type3_message

* Modification of ntlm processing state to NTLMSTATE_TYPE2 is now done
  only when Curl_ntlm_decode_type2_message() has fully succeeded.

As a bonus, this lets our MemoryTracking subsystem track zlib operations.
And also fixes a shortcut some zlib 1.2.x versions took using malloc()
instead of calloc(), which would trigger memory debuggers warnings on
memory being used without having been initialized.

Follow-up to commit 5eb2396c as that wasn't complete.

At times HEADERFUNCTION+HEADERDATA was set only to have only HEADERDATA
set in the subsequent loop which could cause a NULL to get sent as
userdata to 'header_callback' which wasn't made to handle that.

Now HEADERFUNCTION is explicitly set to NULL if it isn't set to the
callback.

Fix macro definition

Calling of curl_memdebug() was still done with a pending free()

As I modified conn->bits.tcpconnect to become an array that holds one
bool for each potential connection all uses of that struct field must
index it correctly.

When connecting, make sure TIMER_CONNECT is set.

When using the multi interface, a SOCKS proxy, and a connection that
wouldn't immediately consider itself connected (which my Linux tests do
by default), libcurl would be tricked into doing _two_ connects to the
SOCKS proxy when it setup the data connection and then of course the
second attempt would fail miserably and cause error.

This problem is a regression that was introduced by commit
4a42e5cd that was introduced in the 7.21.7 release.

Bug: http://curl.haxx.se/mail/lib-2011-08/0199.html
Reported by: Fabian Keil

Until 2011-08-17 libcurl's Memory Tracking feature also performed
automatic malloc and free filling operations using 0xA5 and 0x13
values. Our own preinitialization of dynamically allocated memory
might be useful when not using third party memory debuggers, but
on the other hand this would fool memory debuggers into thinking
that all dynamically allocated memory is properly initialized.

As a default setting, libcurl's Memory Tracking feature no longer
performs preinitialization of dynamically allocated memory on its
own. If you know what you are doing, and really want to retain old
behavior, you can achieve this compiling with preprocessor symbols
CURL_MT_MALLOC_FILL and CURL_MT_FREE_FILL defined with appropriate
values.

"release-ssl-ssh2-zlib" and "debug-ssl-ssh2-zlib" are two new makefile
targets that build libcurl with MSVC and link with libssh2

Bug: http://curl.haxx.se/bug/view.cgi?id=3388920
Reported by: "kdekker"

Two problems were fixed:

GET_PARAMETER responses that have no body must be 204 response or
properly set length to 0.

One of the <data> sections had the wrong content-length for its
GET_PARAMETER response.

Enabled test 572 again.

As bug 3385258 pointed out but I missed up the fix for. This is another
take at a fix.

Bug: http://curl.haxx.se/bug/view.cgi?id=3392101
Reported by: Wu Yongzheng

IRIX 6.5.24 gcc 3.3 autobuilds fail unittests library compilation due to a
problem related with OpenSSL headers and library versions not matching.

All AIX autobuilds fails unit tests linking against unittests library due to
unittests library being built with no symbols or members. Libtool ?

Bug: https://bugzilla.redhat.com/728562

Added comments to some remaining issues

Summary of the issue can be found at:
http://curl.haxx.se/mail/lib-2010-04/0367.html

That patch only updated the unix sockets code - the winsock code was not
updated and no longer works the same was as the unix code. This change
updates the windows code accordingly.

Bug: http://curl.haxx.se/bug/view.cgi?id=3163118

291 - bug 3383692 "GET PARAMETER request and body in response"

Inclusion of header "memdebug.h" in http_ntlm.c got lost in commit 98fb0ef7.

Bug: http://curl.haxx.se/bug/view.cgi?id=3383692