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

Aleksander Machniak

2013-10-17 197203727417a03d87053a47e5aa5175a76e3e0b

 program/include/rcube_plugin_api.php

@@ -33,6 +33,7 @@
  public $output;
  public $config;
  public $allowed_prefs = array();
  public $allowed_session_prefs = array();
  
  public $handlers = array();
  private $plugins = array();