update lua file headers

dat/bigrm-3.lua

@@ -1,4 +1,8 @@
-
+-- NetHack bigroom bigrm-3.lua	$NHDT-Date: 1652196021 2022/05/10 15:20:21 $  $NHDT-Branch: NetHack-3.7 $:$NHDT-Revision: 1.1 $
+--	Copyright (c) 1989 by Jean-Christophe Collet
+--	Copyright (c) 1990 by M. Stephenson
+-- NetHack may be freely redistributed.  See license for details.
+--
 des.level_init({ style = "solidfill", fg = " " });
 des.level_flags("mazelevel", "noflip");