add pool.all_working_conns()
add pool.all_working_conns()

to query all connections actually waiting on a pending request, as
opposed to pending setup or waiting on the request queue.

driftx/Telephus,Metaswitch/Telephus,Metaswitch/Telephus,driftx/Telephus,ClearwaterCore/Telephus,ClearwaterCore/Telephus