/**
  * @see LogoutAction::doLogout()
  */
 protected function doLogout()
 {
     parent::doLogout();
     // remove cookies
     if (isset($_COOKIE[COOKIE_PREFIX . 'userID'])) {
         HeaderUtil::setCookie('userID', 0);
     }
     if (isset($_COOKIE[COOKIE_PREFIX . 'password'])) {
         HeaderUtil::setCookie('password', '');
     }
 }