[Openstack-stable-maint] Possibility of accidental merge commits in stable backports

Just wanted to provide a heads up that this Gerrit bug was brought to the attention of the Infra team yesterday: http://code.google.com/p/gerrit/issues/detail?id=1107 In short, be on the lookout for any backport change which is actually the same Git SHA as on the master branch (probably the most obvious sign will be lack of a cherry-pick header in the commit message, since changes to the commit message also change the Git SHA). Currently Gerrit won't protect us from someone proposing a change from one branch to another if the parent commit of that change is already in the former branch, even though it's not (yet) in the latter. -- Jeremy Stanley