Reimplement max_idle without a separate thread

Remove the KillIdle thread.  Add timeout to struct iop, initialized in
io_open().  Obey it in io_input() by passing it to empth_select().  If
empth_select() times out, report that back through io_input() to
recvclient() and player_login().  If player_login() receives a timeout
indication, print a message and terminate the session.  If
recvclient() receives a timeout indication, flash a message to the
player and initiate a shut down the player's session.

Create WIN32 sys/time.h to define struct timeval.  This creates some
conflicts with WIN32 windows.h definitions.  Including windows.h in
show.c and info.c creates conflicts, so remove that.  Modify service.c
to include sys/socket.h instead of windows.h to remove the conflict
with sys/time.h.

src/lib/lwp/lwpint.h

@@ -52,6 +52,7 @@ struct lwpProc {
     int pri;			/* which scheduling queue we're on */
     time_t runtime;		/* time at which process is restarted */
     int fd;			/* fd we're blocking on */
+    int fd_ready;		/* woken up because fd was ready */
     int argc;			/* initial arguments */
     char **argv;
     void *ud;			/* user data */