Windows CE port fixes/enhancements (from <Someone>)

A few other fixes:
- bug: text window does not scroll left on left arrow
- pcmain.c: fix warning: _fileno() returns void* in Windows CE SDK

3.5.0 only:
- files.c: compile error: don't include <signal.h> if NO_SIGNAL is defined. WinMo does not support POSIX signals
- version.c: compile error: append_port_id() is undeclared
- link error: mktime() is unsupported -> define it in celib.c

-<Someone>

sys/share/pcmain.c

@@ -1,5 +1,4 @@
 /* NetHack 3.5	pcmain.c	$Date$  $Revision$ */
-/*	SCCS Id: @(#)pcmain.c	3.5	2008/01/30	*/
 /* Copyright (c) Stichting Mathematisch Centrum, Amsterdam, 1985. */
 /* NetHack may be freely redistributed.  See license for details. */
 
@@ -236,7 +235,7 @@ char *argv[];
 		 */
 		if (!strncmp(argv[1], "-s", 2)) {
 #if defined(MSWIN_GRAPHICS) || defined(WIN32CON)
-			int sfd = _fileno(stdout);
+			int sfd = (int)_fileno(stdout);
 			redirect_stdout = (sfd >= 0) ? !isatty(sfd) : 0;
 
 # ifdef MSWIN_GRAPHICS