Fixes the problem when a transfer in a pipeline times out.

Even though commit 23e70e1c mentioned the v110_xp toolset, I had
forgotten to include the relevant pre-processor definitions.

warning: unused parameter 'reason'

warning: unused parameter 'easy'

Updated the usage of some legacy APIs, that are preventing curl from
compiling for Windows Store and Windows Phone build targets.

Suggested-by: Stefan Neis
Feature: http://sourceforge.net/p/curl/feature-requests/82/

Visual Studio 2012 introduced support for Windows Store apps as well as
supporting Windows Phone 8. Introduced build targets that allow more
modern APIs to be used as certain legacy ones are not available on these
new platforms.

Just like in the NTLM code, added infof() failure messages for
DIGEST-MD5 and GSSAPI authentication when base64 decoding fails.

For consistency renamed USE_KRB5 to USE_KERBEROS5.

Windows does not support using select() for sleeping without a dummy
socket. Instead use Windows' Sleep() and sleep for 100ms which is the
minimum suggested value in the curl_multi_fdset() doc.

Prior to this change the multi examples would exit prematurely since
select() would error instead of sleeping when called without an fd.

Reported-by: Johan Lantz
Bug: http://curl.haxx.se/mail/lib-2014-11/0221.html

There was a mismatch in function parameter names.

Although libcurl would never return CURL_VERSION_KERBEROS4 after 7.33,
so would not be output with --version, removed krb4 from the supported
features output.

This variable is only used with HAVE_GSSAPI is defined by the FTP code
so let's place the definition with the other GSS-API based variables.

Rather than define the function as extern in the source files that use
it, moved the function declaration into the SASL header file just like
the Digest and NTLM clean-up functions.

Additionally, added a function description comment block.

Revert commit 2257deb5

 (Cmake: Avoid cycle directory dependencies,
2014-08-22) and add a comment explaining the purpose of the original
code.

The check_library_exists_concat macro is intended to be called multiple
times on a sequence of possibly dependent libraries.  Later libraries
may depend on earlier libraries when they are static.  They cannot be
safely linked in reverse order on some platforms.

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

Revert commit 1269df2e

 (Cmake: Don't check for all headers each
time, 2014-08-15) and add a comment explaining the purpose of the
original code.

The check_include_file_concat macro is intended to be called multiple
times on a sequence of possibly dependent headers.  Later headers
may depend on earlier headers to provide declarations.  They cannot
be safely included independently on some platforms.

For example, many POSIX APIs document including sys/types.h before some
other headers.  Also on some OS X versions sys/socket.h must be included
before net/if.h or the check for the latter will fail.

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

This is the only user of the backtick operator in the command. As the
commands will soon not be executed by a shell anymore (but by perl),
replace the command with its output.

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

Previously if HTTP/2 traffic is appended to HTTP Upgrade response header
(thus they are in the same buffer), the trailing HTTP/2 traffic is not
processed and lost.  The appended data is most likely SETTINGS frame.
If it is lost, nghttp2 library complains server does not obey the HTTP/2
protocol and issues GOAWAY frame and curl eventually drops connection.
This commit fixes this problem and now trailing data is processed.

Commit fe0f8967 fixed a problem with krb5 not being defined as a
supported feature when HAVE_GSSAPI is defined, however, it should
only be included if CURL_DISABLE_CRYPTO_AUTH is not set, like when
SPNEGO is listed as a feature.

It isn't used anywhere!

Reported-by: Carlo Wood

Makes test1119 pass when building with cmake.

configurehelp.pm is generated by configure (autotools). As cmake does
not provide a separate variable for the C preprocessor, default to cpp.
Before commit ef24ecde

 ("symbol-scan:
use configure script knowledge about how to run the C preprocessor"),
this tool would also use 'cpp'.

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

Fix detection of the AsynchDNS feature which not just depends on
pthreads support, but also on whether USE_POSIX_THREADS is set or not.
Caught by test 1014.

This patch adds a new ENABLE_THREADED_RESOLVER option (corresponding to
--enable-threaded-resolver of autotools) which also needs a check for
HAVE_PTHREAD_H.

For symmetry with autotools, CURL_USE_ARES is renamed to ENABLE_ARES
(--enable-ares). Checks that test for the availability actually use
USE_ARES instead as that is the result of whether a-res is available or
not (in practice this does not matter as CARES is marked as required
package, but nevertheless it is better to write the intent).

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

Used by some test cases via LD_PRELOAD in order to fake the host name.

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