LRN: Fixing Mantis #1974: On W32 winsock2.h defines FD_SETSIZE (if it was not defined...

LRN: Fixing Mantis #1974: On W32 winsock2.h defines FD_SETSIZE (if it was not defined before inclusion of the header) to 64, which means that it's not possible to select on more than 64 sockets at once. This might work during the tests, but in the wild people might want to have more than 60 connections, at least in the transport service.
The patch attached should increase the limit to 1024.