Fix bug #9104 - winbindd can mis-identify idle clients - can cause crashes and NDR...

Fix bug #9104 - winbindd can mis-identify idle clients - can cause crashes and NDR parsing errors.

A connection is idle when both struct winbindd_cli_state->request AND
struct winbindd_cli_state->response are NULL. Otherwise we can flag
as idle a connection in the state of having sent the request to
the winbindd child (request != NULL) but not yet received a reply
(response == NULL).

Autobuild-User(master): Jeremy Allison <jra@samba.org>
Autobuild-Date(master): Tue Aug 21 01:31:46 CEST 2012 on sn-devel-104