Do not log compilation informational messages.

Inspiration provided by: Daniel Stenberg and Ray Satiro

Bug: https://curl.haxx.se/docs/adv_20160530.html

Ref: Windows DLL hijacking with curl, CVE-2016-4802

Previously, when a stream was closed with other than NGHTTP2_NO_ERROR
by RST_STREAM, underlying TCP connection was dropped.  This is
undesirable since there may be other streams multiplexed and they are
very much fine.  This change introduce new error code
CURLE_HTTP2_STREAM, which indicates stream error that only affects the
relevant stream, and connection should be kept open.  The existing
CURLE_HTTP2 means connection error in general.

Ref: https://github.com/curl/curl/issues/659
Ref: https://github.com/curl/curl/pull/663

Renamed the header and source files for this module as they are HTTP
specific and as such, they should use the naming convention as other
HTTP authentication source files do - this revert commit 260ee6b7.

Note: We could also rename curl_ntlm_wb.[c|h], however, the Winbind
code needs separating from the HTTP protocol and migrating into the
vauth directory, thus adding support for Winbind to the SASL based
protocols such as IMAP, POP3 and SMTP.

As the GSS-API and SSPI based source files are no longer library/API
specific, following the extraction of that authentication code to the
vauth directory, combine these files rather than maintain two separate
versions.

Part 2 of 2 - Moved the GSS-API based Negotiate authentication code.

Part 1 of 2 - Moved the SSPI based Negotiate authentication code.

The two options are almost the same, except in the case of OpenSSL:

CURLINFO_TLS_SESSION OpenSSL session internals is SSL_CTX *.

CURLINFO_TLS_SSL_PTR OpenSSL session internals is SSL *.

For backwards compatibility we couldn't modify CURLINFO_TLS_SESSION to
return an SSL pointer for OpenSSL.

Also, add support for the 'internals' member to point to SSL object for
the other backends axTLS, PolarSSL, Secure Channel, Secure Transport and
wolfSSL.

Bug: https://github.com/curl/curl/issues/234


Reported-by:  <dkjjr89@users.noreply.github.com>

Bug: https://curl.haxx.se/mail/lib-2015-09/0127.html
Reported-by: Michael König

Some TFTP server implementations ignore the "TFTP Option extension"
(RFC 1782-1784, 2347-2349), or implement it in a flawed way, causing
problems with libcurl. Another switch for curl_easy_setopt
"CURLOPT_TFTP_NO_OPTIONS" is introduced which prevents libcurl from
sending TFTP option requests to a server, avoiding many problems caused
by faulty implementations.

Bug: https://github.com/curl/curl/issues/481

setup-vms.h: Symbol case fixups submitted by Michael Steve

build_gnv_curl_pcsi_desc.com: VSI aka as VMS Software, is now the
supplier of new versions of VMS.  The install kit needs to accept
VSI as a producer.

This file was removed in commit fd137786

* Add new options, CURLOPT_PROXY_SERVICE_NAME and CURLOPT_SERVICE_NAME.
* Add new curl options, --proxy-service-name and --service-name.

The function "free" is documented in the way that no action shall occur for
a passed null pointer. It is therefore not needed that a function caller
repeats a corresponding check.
http://stackoverflow.com/questions/18775608/free-a-null-pointer-anyway-or-check-first



This issue was fixed by using the software Coccinelle 1.0.0-rc24.

Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>

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.

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