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.

Carrying on from commit 11025613, added VC9 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.

Given that we presently support "auth" and not "auth-int" or "auth-conf"
for native challenge-response messages, added client side validation of
the quality-of-protection options from the server's challenge message.

... the recent MSVC project files added by Steve Holme

Bug: http://curl.haxx.se/mail/lib-2014-04/0063.html
Reported-by: Jeroen Koekkoek

To avoid urldata.h being included from the header file or that the
source file has the correct include order as highlighted by one of
the auto builds recently.

warning: no previous prototype for 'Curl_sasl_create_digest_md5_message'

warning: 'sasl_digest_get_key_value' defined but not used