Replace and phase out the (old) oakdoor graphic with something different

git-svn-id: svn://svn.code.sf.net/p/crossfire/code/maps/trunk@10775 282e977c-c81d-0410-88c4-b93c2d0d6712

sisters/tower1

@@ -9,7 +9,7 @@ enter_x 7
 enter_y 15
 msg
 Created:  1994-12-18 bt (thomas@nomad.astro.psu.edu)
-Modified: 2008-10-28 Rick Tanner
+Modified: 2008-11-29 Rick Tanner
 endmsg
 end
 arch sea
@@ -804,13 +804,17 @@ arch flagstone
 x 7
 y 15
 end
-arch oakdoor
+arch invis_exit
 slaying /sisters/entrance
 hp 5
 sp 15
 x 7
 y 15
 end
+arch door_2
+x 7
+y 15
+end
 arch flagstone
 x 8
 end
@@ -909,13 +913,17 @@ arch flagstone
 x 8
 y 15
 end
-arch oakdoor
+arch invis_exit
 slaying /sisters/entrance
 hp 5
 sp 15
 x 8
 y 15
 end
+arch door_2
+x 8
+y 15
+end
 arch flagstone
 x 9
 end