Dr.Who graphiti (trunk only)

Add an entry to the set of randomly placed engravings.  The revival
of Doctor Who, which seems to be referred to as Series 1 through Series 4
ignoring umpteen years of earlier versions, showed graphiti of "BAD WOLF"
intermittently throughout season two and brought it back for the finale
of season four.  As far as I noticed, it was always written in all caps.

src/engrave.c

@@ -1,4 +1,4 @@
-/*	SCCS Id: @(#)engrave.c	3.5	2007/01/26	*/
+/*	SCCS Id: @(#)engrave.c	3.5	2008/08/28	*/
 /* Copyright (c) Stichting Mathematisch Centrum, Amsterdam, 1985. */
 /* NetHack may be freely redistributed.  See license for details. */
 
@@ -32,6 +32,7 @@ static const char *random_mesg[] = {
 	"You've got mail!", /* AOL */
 #endif
 	"As if!", /* Clueless */
+	"BAD WOLF", /* 200x incarnation of Dr.Who */
 };
 
 char *