Patch queue

Patches without an ACK:

Patch	ACK	Notes
Fix warnings in event.c when building for win32-64	jamesyonan, andj
Remove wrapper code for Windows CryptoAPI function	jamesyonan
Better --auto-proxy support for Windows		introductory patch
- Add MinGW WinHTTP compatibility layer
- Do automatic proxy detection on Windows right...
- Query auto-proxy information when connecting...
Add IPv6 gateway support for Linux, FreeBSD, and Darwin