[SSSD] [PATCH] Add support for terminating idle connections in sssd_nss

[Stephen Gallagher]

This patch was submitted by Shantanu Goel in a Trac ticket. Sending to
the list for review. I haven't yet had a chance to dig into it myself
yet, but the concept as described in
https://fedorahosted.org/sssd/ticket/1354 is sound, so I'd like to see
this get cleaned up and included.