everything to controllers

code/controllers/configuration/config_entry.dm

@@ -10,6 +10,8 @@
 	var/resident_file	//the file which this was loaded from, if any
 	var/modified = FALSE	//set to TRUE if the default has been overridden by a config entry
 
+	var/deprecated_by	//the /datum/config_entry type that supercedes this one
+
 	var/protection = NONE
 	var/abstract_type = /datum/config_entry	//do not instantiate if type matches this
 
@@ -85,6 +87,9 @@
 /datum/config_entry/proc/ValidateListEntry(key_name, key_value)
 	return TRUE
 
+/datum/config_entry/proc/DeprecationUpdate(value)
+	return
+
 /datum/config_entry/string
 	config_entry_value = ""
 	abstract_type = /datum/config_entry/string