Pierre-Yves David <pierre-yves.david@octobus.net> [Tue, 04 May 2021 11:20:10 +0200] rev 47270
changelogv2: use a dedicated on disk format for changelogv2
We drop two unused entry. This is mostly a proof of concept before starting to
actually rework the format.
Differential Revision: https://phab.mercurial-scm.org/D10667