This makes curl pick better (stronger) ciphers by default. The strongest
available ciphers are fine according to the HTTP/2 spec so an OpenSSL
built curl is no longer rejected by string HTTP/2 servers.

Bug: http://curl.haxx.se/bug/view.cgi?id=1487

Required for the tests to work after a5d99494.

...after the method line:

 "Since the Host field-value is critical information for handling a
 request, a user agent SHOULD generate Host as the first header field
 following the request-line." / RFC 7230 section 5.4

Additionally, this will also make libcurl ignore multiple specified
custom Host: headers and only use the first one. Test 1121 has been
updated accordingly

Bug: http://curl.haxx.se/bug/view.cgi?id=1491
Reported-by: Rainer Canavan

Also unified printing to STDERR by creating the helper method "report".

When checking for a connection to re-use, a proxy-using request must
check for and use a proxy connection and not one based on the host
name!

Added test 1421 to verify

Bug: http://curl.haxx.se/bug/view.cgi?id=1492

- Change the continuous integration script to use 'make test-full'
instead of just 'make test' so that the diagnostic log output is
printed to stdout when a test fails.

- Change the continuous integration script to use
'./configure --enable-debug' instead of just './configure' so that the
memory analyzer will work during testing.

Prior to this change Travis used its default C test script:
./configure && make && make test

Instead of priting cipher and MAC algorithms names separately, print the
whole cipher suite string which also includes the key exchange algorithm,
along with the negotiated TLS version.

Bug: https://github.com/bagder/curl/pull/157

The code used some happy eyeballs logic even _after_ CONNECT has been
sent to a proxy, while the happy eyeball phase is already (should be)
over by then.

This is solved by splitting the multi state into two separate states
introducing the new SENDPROTOCONNECT state.

Bug: http://curl.haxx.se/mail/lib-2015-01/0170.html
Reported-by: Peter Laser

Since they already exist and will make comparing easier

malloc() and strdup() calls without checking return codes.

Reported-by: Markus Elfring
Bug: https://github.com/bagder/curl/issues/150

Reported-by: Jonathan Cardoso

In addition to commit 709cf76f, removed the USE_SSLEAY preprocessor
variable from the Visual Studio project files as it isn't required
anymore.

Since 1342a96e, a timeout detected in the multi state machine didn't
necesarily clear everything up, like formpost data.

Bug: https://github.com/bagder/curl/issues/147
Reported-by: Michel Promonet
Patched-by: Michel Promonet

OpenSSL handling was a little broken.

SSLeay was the name of the library that was subsequently turned into
OpenSSL many moons ago (1999). curl does not work with the old SSLeay
library since years. This is now reflected by only using USE_OPENSSL in
code that depends on OpenSSL.

Acked-by: Brad King

... which otherwise made the script skip the _LAST define for some
symbols.

Reported-by: Jeroen Ooms
Bug: http://curl.haxx.se/mail/lib-2015-03/0052.html

Reported-by: Jon Seymour

No need to use _MPRINTF_REPLACE internally.

Bug: https://github.com/bagder/curl/pull/144

... and as a consequence, introduce curl_printf.h with that re-define
magic instead and make all libcurl code use that instead.