Misc fixes in HTTP parsing

* HTTP headers are case insensitive (see RFC2616 4.2 for details)
* Check errors when parsing status line
* treat LWS around the colon in headers
Merge pull request #1242 from hardening/http_fixes

Misc fixes in HTTP parsing
handle drdynv version 3
libfreerdp-client: load rdpdr when rdpsnd is loaded
Merge pull request #1246 from dpoe/master

Handle Drdynvc Version 3
Merge branch 'master' of github.com:FreeRDP/FreeRDP
xfreerdp: disable scaling by default
channels/tsmf: implement set source video rect (0x116)
xfreerdp: fix building with Xi
Merge pull request #1247 from awakecoding/master

Stream Refactoring, rdpsnd fix, tsmf improvement, xfreerdp-server fixes, multimon fixes
cmdline: add max-fast-path-size argument.
libfreerdp-core/tcp: add a null pointer check.