Coverity CID 1288826

- Get rid of this flood of warnings in Windows mingw build:
warning: missing terminating " character

The warning is due to the carriage return. When msysgit checks out files
from the repo by default it converts the line endings to CRLF. Prior to
this change when mkhelp.pl processed the MANUAL and curl.1 in CRLF
format the trailing carriage returns caused unnecessary CR in the
output.

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

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

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.

... to avoid a build failure when configured with --enable-debug

As the 'error' and 'mute' options are now part of the GlobalConfig,
rather than per Operation, updated the warnf() function to use this
structure rather than the OperationConfig.

Use "cmake -E echo" instead of "echo".

Reviewed-by: Brad King <brad.king@kitware.com>

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

This enables the CURLOPT_SSL_VERIFYSTATUS functionality.

Use Unix when generically writing about Unix based systems as UNIX is
the trademark and should only be used in a particular product's name.

In line with the other features listed in the --version output,
capitalise the UNIX socket feature.

To offer some more info and yet it doesn't use more lines.

lib/setup-vms.h : VAX HP OpenSSL port is ancient, needs help.
                  More defines to set symbols to uppercase.

src/tool_main.c : Fix parameter to vms_special_exit() call.

packages/vms/ :
  backup_gnv_curl_src.com : Fix the error message to have the correct package.

  build_curl-config_script.com : Rewrite to be more accurate.

  build_libcurl_pc.com : Use tool_version.h now.

  build_vms.com : Fix to handle lib/vtls directory.

  curl_gnv_build_steps.txt : Updated build procedure documentation.

  generate_config_vms_h_curl.com :
       * VAX does not support 64 bit ints, so no NTLM support for now.
       * VAX HP SSL port is ancient, needs some help.
       * Disable NGHTTP2 for now, not ported to VMS.
       * Disable UNIX_SOCKETS, not available on VMS yet.
       * HP GSSAPI port does not have gss_nt_service_name.

  gnv_link_curl.com : Update for new curl structure.

  pcsi_product_gnv_curl.com : Set up to optionally do a complete build.

As the former contruct apparently caused a compiler warning, mentioned
in d8efde07.

There was a mix of GlobCode, CURLcode and ints and they were mostly
passing around CURLcode errors. This change makes the functions use only
CURLcode and removes the GlobCode type completely.

The loop in glob_next_url() needs to be done backwards to maintain the
logic. dc197894 caused test 1235 to fail.

By counting from 0 and up instead of backwards like before, we remove
the need for the "funny" check of the unsigned variable when decreased
passed zero. Easier to read and less risk for compiler warnings.

The >= 0 is actually not required, since i underflows and
the for-loop is stopped using the < condition, but this
makes the VS2012 compiler and code analysis happy.

Fixes code analysis warning C6031:
return value ignored: <function> could return unexpected value

This caused a null-pointer dereference which caused a few dozen
torture tests to fail.

Mark CURLOPT_UNIX_SOCKET_PATH as string to ensure that it ends up as
option in the file generated by --libcurl.

Signed-off-by: Peter Wu <peter@lekensteyn.nl>

Signed-off-by: Peter Wu <peter@lekensteyn.nl>

The ability to do HTTP requests over a UNIX domain socket has been
requested before, in Apr 2008 [0][1] and Sep 2010 [2]. While a
discussion happened, no patch seems to get through. I decided to give it
a go since I need to test a nginx HTTP server which listens on a UNIX
domain socket.

One patch [3] seems to make it possible to use the
CURLOPT_OPENSOCKETFUNCTION function to gain a UNIX domain socket.
Another person wrote a Go program which can do HTTP over a UNIX socket
for Docker[4] which uses a special URL scheme (though the name contains
cURL, it has no relation to the cURL library).

This patch considers support for UNIX domain sockets at the same level
as HTTP proxies / IPv6, it acts as an intermediate socket provider and
not as a separate protocol. Since this feature affects network
operations, a new feature flag was added ("unix-sockets") with a
corresponding CURL_VERSION_UNIX_SOCKETS macro.

A new CURLOPT_UNIX_SOCKET_PATH option is added and documented. This
option enables UNIX domain sockets support for all requests on the
handle (replacing IP sockets and skipping proxies).

A new configure option (--enable-unix-sockets) and CMake option
(ENABLE_UNIX_SOCKETS) can disable this optional feature. Note that I
deliberately did not mark this feature as advanced, this is a
feature/component that should easily be available.

 [0]: http://curl.haxx.se/mail/lib-2008-04/0279.html
 [1]: http://daniel.haxx.se/blog/2008/04/14/http-over-unix-domain-sockets/
 [2]: http://sourceforge.net/p/curl/feature-requests/53/
 [3]: http://curl.haxx.se/mail/lib-2008-04/0361.html
 [4]: https://github.com/Soulou/curl-unix-socket



Signed-off-by: Peter Wu <peter@lekensteyn.nl>