Versions of OpenSSL prior to v0.9.8h do not support the necessary
functions for OCSP stapling.

Previously we don't ignore PUSH_PROMISE header fields in on_header
callback.  It makes header values mixed with following HEADERS,
resulting protocol error.

Prior to this change the options for exclusive SSL protocol versions did
not actually set the protocol exclusive.

http://curl.haxx.se/mail/lib-2015-01/0002.html
Reported-by: Dan Fandrich

Reported-by: Jon Seymour

Removed the curl_ prefix from the schannel source files as discussed
with Marc and Daniel at FOSDEM.

The struct went private in 1.0.2 so we cannot read the version number
from there anymore. Use SSL_version() instead!

Reported-by: Gisle Vanem
Bug: http://curl.haxx.se/mail/lib-2015-02/0034.html

The previous one was "encumbered" by RSA Inc - to avoid the licensing
restrictions it has being replaced. This is the initial import,
inserting the md5.c and md5.h files from
http://openwall.info/wiki/people/solar/software/public-domain-source-code/md5

Code-by: Alexander Peslyak

The previous one was "encumbered" by RSA Inc - to avoid the licensing
restrictions it has being replaced. This is the initial import,
inserting the md4.c and md4.h files from
http://openwall.info/wiki/people/solar/software/public-domain-source-code/md4

Code-by: Alexander Peslyak

Reported-by: Tamir

The file number used was wrong. This bug was introduced over 10 years
ago, proving this function isn't used much...

Bug: http://curl.haxx.se/bug/view.cgi?id=1476
Reported-by: Tamir

... by removing generated files from the *_DIST variable [*] and instead
generate them with a .dist suffix, since that is then handled and put
into the release archive by our generic dist-hook.

[*] = 'make distcheck' fails with non-existing files listed there

Better use of 80 character line limit, comment corrections and line
spacing preferences.

Added the removal of the locally generated project files so one
may revert to a clean repository.

In preparation for adding the test suite and examples projects renamed
the top level "all" solution files to better describe what they are.

This will also enable us to use "curl" rather than "curlsrc" for the
command line tool solution and project files, which will simplify some
of the configuration.

Defined the DEBUGBUILD pre-processor variable to allow extra logging,
which is particularly useful in debug builds, as we use this and Visual
Studio typically uses _DEBUG.

We could define DEBUBBUILD, in curl_setup.h, when _MSC_VER and _DEBUG is
defined but that would also affect the makefile based builds which we
probably don't want to do.

And modify the text to refer to HTTP 2 as it isn't called "2.0".

Reported-By: Michael Wallner