From: LongkerDandy <longkerdandy_at_gmail.com>
Date: Fri, 13 Jun 2014 15:09:24 +0800

Hi

It seems when using Port Unification,
event like handleConnect handleAccept handleClose won't redirect to child
filter.

So child filter handle doesn't has chance to do the cleanup when connection
is closed.

Regards
LongkerDandy