Fix vulnerability in handling _session argument of utils/save-prefs (#1489382)

Aleksander Machniak

2013-10-17 70c7df8faa5a9023a2773dc5a38932f1ad3a84aa

 program/lib/Roundcube/rcube_plugin_api.php

@@ -37,6 +37,7 @@
    public $output;
    public $handlers = array();
    public $allowed_prefs = array();
    public $allowed_session_prefs = array();

    protected $plugins = array();
    protected $tasks = array();