Logout-IFrame: Reduce timeout to 5 seconds.

The 10-second timeout is too long. Reduce it to 5 seconds instead.

git-svn-id: https://simplesamlphp.googlecode.com/svn/trunk@2333 44740490-163a-0410-bde0-09ae8108e29a

modules/core/www/idp/logout-iframe.php

@@ -17,7 +17,7 @@ if (isset($_REQUEST['type'])) {
 if (isset($_REQUEST['timeout'])) {
 	$timeout = (int)$_REQUEST['timeout'];
 } else {
-	$timeout = time() + 10;
+	$timeout = time() + 5;
 }
 
 if ($type !== 'embed' && $type !== 'async') {