* ftp.c: Include Winsock 2 instead of Winsock.

* ftp.c: Include Winsock 2 instead of Winsock.
* ftp_var.h: Include Winsock 2 headers.
* secure.c: Include port-sockets.h on Win32.
* main.c: Include mswsock.h (MS Winsock extensions) so that we get
   some socket options we need to convert sockets to "file
   descriptors" used in posix-like routines.  We now need to pull
   this in explictly now that we are using Winsock 2.

git-svn-id: svn://anonsvn.mit.edu/krb5/trunk@14381 dc483132-0cff-0310-8789-dd5450dbe970