Pierre-Yves David <pierre-yves.david@octobus.net> [Wed, 18 May 2022 11:55:21 +0100] rev 49333
bundlespec: allow the bundle spec to control the bundle version
This makes it possible to create bundle using changelog-v3.
The `hg debugbundle --spec` output is borked, but this will be fixed in coming
changesets.