Fix infinite loop issue with closing idle connections.  Part of CONNECTORS-829.

git-svn-id: https://svn.apache.org/repos/asf/manifoldcf/trunk@1551737 13f79535-47bb-0310-9956-ffa450edef68
Create a rebased branch to finish CONNECTORS-829

git-svn-id: https://svn.apache.org/repos/asf/manifoldcf/branches/CONNECTORS-829@1551752 13f79535-47bb-0310-9956-ffa450edef68