Ticket 47654 - Fix regression (deadlock/crash)
Bug Description: dblayer_close() is called for shutdowns, and when the backend
is being disabled for certain tasks like db2bak/bak2db. The
original fix assuemd this fucntion was only called during shutdowns.
Fix Description: Only free certain ersouces when the server is actually shutting
down.
https://fedorahosted.org/389/ticket/47654
Reviewed by: rmeggins(Thanks!)