something like
~~~~
/* session_set_cookie_params will override php ini settings
 * If Cookie::$domain is NULL or empty and is passed, PHP
 * will override ini and sent cookies with the host name
 * of the server which generated the cookie
 *
 * @see http://dev.kohanaframework.org/issues/3604
 *
 * @see http://www.php.net/manual/en/function.session-set-cookie-params.php
 * @see http://www.php.net/manual/en/session.configuration.php#ini.session.cookie-domain
 *
 * set to Cookie::$domain if available, otherwise default to ini setting
 */
~~~~