made the alien player limit a config option

Signed-off-by: Cael_Aislinn <cael_aislinn@yahoo.com.au>

code/controllers/configuration.dm

@@ -55,6 +55,8 @@
 	var/automute_on = 0					//enables automuting/spam prevention
 
 	var/usealienwhitelist = 0
+	var/limitalienplayers = 0
+	var/alien_to_human_ratio = 0.5
 
 	var/server
 	var/banappeals
@@ -353,9 +355,15 @@
 
 				if("usealienwhitelist")
 					usealienwhitelist = 1
+
+				if("alien_player_ratio")
+					limitalienplayers = 1
+					alien_to_human_ratio = text2num(value)
+
 				else
 					diary << "Unknown setting in configuration: '[name]'"
 
+
 		else if(type == "game_options")
 			if(!value)
 				diary << "Unknown value for setting [name] in [filename]."