When --with-nghttp2 was used (without a given path), the
PKG_CONFIG_LIBDIR varialbe could get clobbered and ruin a proper
detection of the library.

Reported-by: Dilyan Palauzov
Bug: http://curl.haxx.se/mail/lib-2014-04/0159.html

copy and paste error

ufds might not be allocated in case nfds overflows to zero while
extra_nfds is still non-zero. udfs is then accessed within the
extra_nfds-based for loop.

Follow up on b0e74254

In case the first address in the tempaddr array is NULL,
the code would previously dereference an unchecked null pointer.

I was tempted to change those to >= 0 until I saw that this is
actually a for loop that terminates once i underflows.

The FreeContextBuffer SAL declaration does not declare the pointer
as optional, therefore it must not be NULL.

Added support for parsing query strings from the URL as defined by
RFC-5092.

Should a command return untagged responses that contained no data then
the imap_matchresp() function would not detect them as valid responses,
as it wasn't taking the CRLF characters into account at the end of each
line.

Carrying on from commit 11025613 added VC11 project files which are
capable of supporting side-by-side compilation, 32-bit and 64-bit
builds as well as support for some of the third-party libraries curl
uses.

Carrying on from commit 11025613 added VC10 project files which are
capable of supporting side-by-side compilation, 32-bit and 64-bit
builds as well as support for some of the third-party libraries curl
uses.