Merge branch 'cr/push-force-tag-update'

Require "-f" for push to update a tag, even if it is a fast-forward. * cr/push-force-tag-update: push: allow already-exists advice to be disabled push: rename config variable for more general use push: cleanup push rules comment push: clarify rejection of update to non-commit-ish push: require force for annotated tags push: require force for refs under refs/tags/ push: flag updates that require force push: keep track of "update" state separately push: add advice for rejected tag reference push: return reject reasons as a bitset