use HEAD if no commit was given
update for RHEL 5.11
1021057 - system can consume only one flex entitlement

even if it's subscribed to multiple channels from the same family
1021057 - schema upgrade
1021057 - do not double-count systems subscribed to more than one channel from the same channel family
Automatic commit of package [spacewalk-backend] release [2.3.10-1].