Adds a possession system for ghost mousedrop(). Currently allows for control of mice, drones and use of drone fabricators.

code/controllers/configuration.dm

@@ -214,6 +214,8 @@ var/list/gamemode_cache = list()
 
 	var/list/language_prefixes = list(",","#","-")//Default language prefixes
 
+	var/ghosts_can_possess_animals = 0
+
 /datum/configuration/New()
 	var/list/L = typesof(/datum/game_mode) - /datum/game_mode
 	for (var/T in L)
@@ -420,6 +422,9 @@ var/list/gamemode_cache = list()
 				if ("githuburl")
 					config.githuburl = value
 
+				if ("ghosts_can_possess_animals")
+					config.ghosts_can_possess_animals = value
+
 				if ("guest_jobban")
 					config.guest_jobban = 1