tcpip: fix for udp socket close.

tcpip: fix for udp socket close.
ws2_32: unstub WSAFDIsSet, small amount of work on select
msafd: select fixes
afd: major select overhaul
- 1 exit point for poll objects from the deviceext
- make sure to cancel the timer
- UpdatePollWithFCB now runs at DISPATCH_LEVEL in every case
- Added handle locks so we can signal and check handles properly

svn path=/trunk/; revision=11684