Allow usage of Teleporter and QueryAds backend only if a valid session is detected (#415)

scripts/pi-hole/php/queryads.php

@@ -6,6 +6,9 @@
 *  This file is copyright under the latest version of the EUPL.
 *  Please see LICENSE file for your rights under this license. */
 
+require "password.php";
+if(!$auth) die("Not authorized");
+
 ob_end_flush();
 ini_set("output_buffering", "0");
 ob_implicit_flush(true);