Underplating, go away (#8138)

Resources/Prototypes/Tiles/plating.yml

@@ -28,8 +28,8 @@
 # TODO kill underplating and all its usages since it is deprecated
 - type: tile
   id: underplating
-  name: underplating
-  texture: underplating
+  name: haqrecyngvat [DO NOT USE]
+  texture: deprecated
   base_turfs:
   - lattice
   is_subfloor: true

Resources/Textures/Tiles/copyright.txt

@@ -11,4 +11,7 @@ reinforced.png taken from /tg/ at commit https://github.com/tgstation/tgstation/
 
 ironsand1-4, junglegrass, eightiesred and eighties taken from TG station at https://github.com/tgstation/tgstation/commit/8abb19545828230d92ba18827feeb42a67a55d49
 arcadeblue edited by Peptide90 based on eightiestred from TG.
-shuttleblue, orange, purple, red and white taken from ParadiseSS13 at https://github.com/ParadiseSS13/Paradise/commit/69c831afcd9aef25a2889b507e4f36a3a5fc6def
+shuttleblue, orange, purple, red and white taken from ParadiseSS13 at https://github.com/ParadiseSS13/Paradise/commit/69c831afcd9aef25a2889b507e4f36a3a5fc6def
+
+deprecated.png made by 20kdc, licensed under SS14's MIT license - don't remove it, it's useful to make sure that maps with old tiles get noticed.
+