CWebDavFile::UNLOCK

function UNLOCK(&$options)
{
	$this->IsDir();
	if (!$this->arParams["not_found"])
	{
		$arProps = $this->_get_props($this->arParams["item_id"]);
		unset($arProps["LOCK"]);
		$this->_set_props($this->arParams["item_id"], $arProps);
	}
	return "204 No Content";
}