Add SetGMStatus to LUA, cleanup unused variable, cleanup naming of new function added to Client class, remove unneeded return on void function. (#1471)

* Fix issue #1469 - remove unused variable in perl_client

* Add SetGMStatus to LUA, clean up naming in client.cpp to be consistent with the perl/lua naming, remove unneeded return in void function

* Delete PERL_CLIENT.ipch

zone/client.cpp

@@ -10241,9 +10241,7 @@ void Client::RemoveItem(uint32 item_id, uint32 quantity)
 	}
 }
 
-void Client::SetAdminStatus(int newStatus) {
+void Client::SetGMStatus(int newStatus) {
 	if (this->Admin() != newStatus)
 		database.UpdateGMStatus(this->AccountID(), newStatus);
-
-	return;
 }