* gss-client.c, gss-server.c, gss-misc.c: Include Windows headers

* gss-client.c, gss-server.c, gss-misc.c: Include Windows headers
instead of Unix headers under Windows.

* gss-server.c (usage): Fix usage info to reflect that service_name is
required.

* gss-misc.c (read_all, write_all): Change write to send and read
to recv for portability.
(gettimeofday): Add an implementation of gettimeofday() for
Windows.

* Makefile.in: Build under Windows.

git-svn-id: svn://anonsvn.mit.edu/krb5/trunk@11981 dc483132-0cff-0310-8789-dd5450dbe970