Ports TG/lummox fix to reduce impact of keysend floods

code/modules/client/message.dm

@@ -4,6 +4,7 @@ proc/addclientmessage(var/ckey, var/message)
 	ckey = ckey(ckey)
 	if(!ckey || !message)
 		return
-	if(!(ckey in clientmessages))
-		clientmessages[ckey] = list()
-	clientmessages[ckey] += message
+	var/list/L = GLOB.clientmessages[ckey]
+	if(!L)
+		GLOB.clientmessages[ckey] = L = list()
+	L += message

code/modules/keybindings/bindings_client.dm

@@ -25,7 +25,7 @@
 		else
 			log_admin("Client [ckey] was just autokicked for flooding keysends; likely abuse but potentially lagspike.")
 			message_admins("Client [ckey] was just autokicked for flooding keysends; likely abuse but potentially lagspike.")
-			QDEL_IN(src, 1)
+			qdel(src)
 			return
 
 	///Check if the key is short enough to even be a real key
@@ -33,7 +33,7 @@
 		to_chat(src, "<span class='userdanger'>Invalid KeyDown detected! You have been disconnected from the server automatically.</span>")
 		log_admin("Client [ckey] just attempted to send an invalid keypress. Keymessage was over [MAX_KEYPRESS_COMMANDLENGTH] characters, autokicking due to likely abuse.")
 		message_admins("Client [ckey] just attempted to send an invalid keypress. Keymessage was over [MAX_KEYPRESS_COMMANDLENGTH] characters, autokicking due to likely abuse.")
-		QDEL_IN(src, 1)
+		qdel(src)
 		return
 	//offset by 1 because the buffer address is 0 indexed because the math was simpler
 	keys_held[current_key_address + 1] = _key