Merged var/muted_ic; var/muted_ooc; var/muted_deadchat; var/muted_pray; var/muted_adminhelp into var/muted as bitflags

Added a config option config.automute_on It toggles automuting.
Admins cannot be muted.
Made the proc/cmd_admin_mute code shorter.
Automuting defaults to off

git-svn-id: http://tgstation13.googlecode.com/svn/trunk@4758 316c924e-a436-60f5-8080-3fe189b3f50e

code/controllers/configuration.dm

@@ -49,6 +49,7 @@
 	var/kick_inactive = 0				//force disconnect for inactive players
 	var/load_jobs_from_txt = 0
 	var/ToRban = 0
+	var/automute_on = 0					//enables automuting/spam prevention
 
 	var/server
 	var/banappeals
@@ -336,6 +337,9 @@
 				if("tor_ban")
 					ToRban = 1
 
+				if("automute_on")
+					automute_on = 1
+
 				else
 					diary << "Unknown setting in configuration: '[name]'"