public function loadConfigFile($conf_file, $vars = null, $app = null)
{
if (is_null($app)) {
$app = $this->getApp();
}
if (!isset($this->_cache['cfile'][$app][$conf_file])) {
$this->_cache['cfile'][$app][$conf_file] = new Horde_Registry_Loadconfig($app, $conf_file, $vars);
}
return $this->_cache['cfile'][$app][$conf_file];
}