ports tgs regal rats (#12479)

* port regal rats

* fix missing line

* royal rat goes after humans too

* okay dont let them attack people

* let them attack people but at less damage

* remove header

code/controllers/configuration/entries/game_options.dm

@@ -435,6 +435,10 @@
 	config_entry_value = 64
 	min_val = 0
 
+/datum/config_entry/number/ratcap
+	config_entry_value = 64
+	min_val = 0
+
 /datum/config_entry/flag/disable_stambuffer
 
 /datum/config_entry/keyed_list/box_random_engine

code/controllers/subsystem/mobs.dm

@@ -8,6 +8,7 @@ SUBSYSTEM_DEF(mobs)
 	var/static/list/clients_by_zlevel[][]
 	var/static/list/dead_players_by_zlevel[][] = list(list()) // Needs to support zlevel 1 here, MaxZChanged only happens when z2 is created and new_players can login before that.
 	var/static/list/cubemonkeys = list()
+	var/static/list/cheeserats = list()
 
 /datum/controller/subsystem/mobs/stat_entry()
 	..("P:[GLOB.mob_living_list.len]")