Panic bunker + new player notification configs

Panic bunker! Uses the power of the database to reject new ckeys that have never connected to the server(s) before.
Admins are exempt, even while deadmin'ed, but they are also unlikely to be new ckeys except in rare cases that involve vv fuckary.

New player notification is now configurable.

Adds a optional default disabled irc notification of a players first time connecting.

code/modules/admin/admin_verbs.dm

@@ -100,7 +100,8 @@ var/list/admin_verbs_server = list(
 	/datum/admins/proc/toggleAI,
 	/client/proc/cmd_admin_delete,		/*delete an instance/object/mob/etc*/
 	/client/proc/cmd_debug_del_all,
-	/client/proc/toggle_random_events
+	/client/proc/toggle_random_events,
+	/client/proc/panicbunker
 	)
 var/list/admin_verbs_debug = list(
 	/client/proc/restart_controller,
@@ -190,7 +191,8 @@ var/list/admin_verbs_hideable = list(
 	/proc/possess,
 	/proc/release,
 	/client/proc/reload_admins,
-	/client/proc/reset_all_tcs
+	/client/proc/reset_all_tcs,
+	/client/proc/panicbunker
 	)
 
 /client/proc/add_admin_verbs()

code/modules/admin/verbs/panicbunker.dm

@@ -0,0 +1,16 @@
+/client/proc/panicbunker()
+	set category = "Server"
+	set name = "Toggle Panic Bunker"
+	if (!config.sql_enabled)
+		usr << "<span class='adminnotice'>The Database is not enabled!</span>"
+		return
+
+	if (!dbcon || !dbcon.IsConnected())
+		usr << "<span class='adminnotice'>The Database is not connected!</span>"
+		return
+
+	config.panic_bunker = (!config.panic_bunker)
+	log_admin("[key_name(usr)] has toggled the Panic Bunker, it is now [(config.panic_bunker?"on":"off")]")
+	message_admins("[key_name_admin(usr)] has toggled the Panic Bunker, it is now [(config.panic_bunker?"on":"off")]")
+	feedback_add_details("admin_verb","PANIC") //If you are copy-pasting this, ensure the 2nd parameter is unique to the new proc!
+