Config for antag forcing (#12171)

code/controllers/configuration/entries/game_options.dm

@@ -35,6 +35,13 @@
 /datum/config_entry/keyed_list/midround_antag/ValidateListEntry(key_name, key_value)
 	return key_name in config.modes
 
+/datum/config_entry/keyed_list/force_antag_count
+	key_mode = KEY_MODE_TEXT
+	value_mode = VALUE_MODE_FLAG
+
+/datum/config_entry/keyed_list/force_antag_count/ValidateListEntry(key_name, key_value)
+	return key_name in config.modes
+
 /datum/config_entry/keyed_list/policy
 	key_mode = KEY_MODE_TEXT
 	value_mode = VALUE_MODE_TEXT

code/game/gamemodes/game_mode.dm

@@ -417,7 +417,7 @@
 				if(player.assigned_role == job)
 					candidates -= player
 
-	if(candidates.len < recommended_enemies)
+	if(candidates.len < recommended_enemies && CONFIG_GET(keyed_list/force_antag_count)[config_tag])
 		for(var/mob/dead/new_player/player in players)
 			if(player.client && player.ready == PLAYER_READY_TO_PLAY)
 				if(!(role in player.client.prefs.be_special)) // We don't have enough people who want to be antagonist, make a separate list of people who don't want to be one