Merge branch 'cc/git-replay'

Introduce "git replay", a tool meant on the server side without working tree to recreate a history. * cc/git-replay: replay: stop assuming replayed branches do not diverge replay: add --contained to rebase contained branches replay: add --advance or 'cherry-pick' mode replay: use standard revision ranges replay: make it a minimal server side command replay: remove HEAD related sanity check replay: remove progress and info output replay: add an important FIXME comment about gpg signing replay: change rev walking options replay: introduce pick_regular_commit() replay: die() instead of failing assert() replay: start using parse_options API replay: introduce new builtin t6429: remove switching aspects of fast-rebase