Apply paxed's DEBUG patch to remove DEBUG/D_DEBUG.

Move debugging output into couple preprocessor defines, which
    are no-op without DEBUG.  To show debugging output from a
    certain source files, use sysconf:

    DEBUGFILES=dungeon.c questpgr.c

    Also fix couple debug lines which did not compile.

This also includes fixes due to Derek Ray to depugpline to work better
on other platforms.

include/sys.h

@@ -15,6 +15,7 @@ struct sysopt {
 	char *recover;	/* how to run recover - may be overridden by win port */
 	char *wizards;
 	char *shellers;	/* like wizards, for ! command (-DSHELL) */
+	char *debugfiles; /* files to show debugplines in. '*' is all. */
 	int   maxplayers;
 		/* record file */
 	int persmax;