if(empty($_COOKIE) && isset($_GET['sessionid']) && isset($_GET['sessioncookie']) && isset($_GET['sessiontest'])) {
$_COOKIE['MoodleSession' . $_GET['sessioncookie']] = $_GET['sessionid'];
$_COOKIE['MoodleSessionTest' . $_GET['sessioncookie']] = $_GET['sessiontest'];
$cookiewasset = true;
}

require_once '../../../config.php';

breaks our session fixation prevention in setup.php, we can not send cookies this way