localrepo: recreate phasecache if changelog was modified (issue4855) Because _phaserevs and _phasesets cache revision numbers, they must be invalidated if there are new commits or stripped revisions. We could do that by calling _phasecache.invalidate(), but it wasn't simple to be integrated with the filecache mechanism. So for now, phasecache will be recreated after repo.invalidate() if 00changelog.i was modified before.

bundle2: allow compressed bundle This changeset adds support for a 'compression' parameter in bundle2 streams. When set, it controls the compression algorithm used for the payload part of the bundle2. There is currently no usage of this except in tests.