Give proper key codes to doors in Tower of Demonology

Part of patch https://sourceforge.net/p/crossfire/patches/420/ by Saiapatsu.

quests/peterm/Demonology/Demon1

@@ -8,7 +8,7 @@ enter_x 7
 enter_y 7
 msg
 Created:  1994-05-30 peterm (peterm@soda.berkeley.edu)
-Modified: 2021-07-25 Andreas Kirschbaum
+Modified: 2021-08-03 Saiapatsu
 endmsg
 end
 arch woodfloor
@@ -908,10 +908,6 @@ arch woodfloor
 x 6
 y 6
 end
-arch key2
-x 6
-y 6
-end
 arch magic_banned
 x 6
 y 7
@@ -920,6 +916,15 @@ arch woodfloor
 x 6
 y 7
 end
+arch key2
+name gate key
+slaying tdem_mlvl_doors
+msg
+This key is from the Tower of Demonology.
+endmsg
+x 6
+y 7
+end
 arch magic_banned
 x 6
 y 8
@@ -937,10 +942,6 @@ arch woodfloor
 x 6
 y 8
 end
-arch key2
-x 6
-y 8
-end
 arch magic_banned
 x 6
 y 9
@@ -1248,10 +1249,6 @@ arch woodfloor
 x 8
 y 6
 end
-arch key2
-x 8
-y 6
-end
 arch charwoman
 name overworked gossipy cleaning woman
 msg
@@ -1273,6 +1270,15 @@ arch woodfloor
 x 8
 y 7
 end
+arch key2
+name gate key
+slaying tdem_mlvl_doors
+msg
+This key is from the Tower of Demonology.
+endmsg
+x 8
+y 7
+end
 arch magic_banned
 x 8
 y 8
@@ -1290,10 +1296,6 @@ arch woodfloor
 x 8
 y 8
 end
-arch key2
-x 8
-y 8
-end
 arch magic_banned
 x 8
 y 9

quests/peterm/Demonology/MasterLevel

@@ -8,7 +8,7 @@ enter_x 9
 enter_y 10
 msg
 Created:  1994-04-30 peterm (peterm@soda.berkeley.edu)
-Modified: 2011-12-29 Rick Tanner
+Modified: 2021-08-03 Saiapatsu
 endmsg
 end
 arch woodfloor
@@ -1448,6 +1448,7 @@ x 8
 y 9
 end
 arch locked_door2
+slaying tdem_mlvl_doors
 x 8
 y 9
 end
@@ -1456,6 +1457,7 @@ x 8
 y 10
 end
 arch locked_door2
+slaying tdem_mlvl_doors
 x 8
 y 10
 end
@@ -1917,6 +1919,7 @@ x 11
 y 9
 end
 arch locked_door2
+slaying tdem_mlvl_doors
 x 11
 y 9
 end
@@ -1925,6 +1928,7 @@ x 11
 y 10
 end
 arch locked_door2
+slaying tdem_mlvl_doors
 x 11
 y 10
 end