Pierre-Yves David <pierre-yves.david@octobus.net> [Tue, 07 Mar 2023 03:42:40 +0100] rev 50291
undo-files: cleanup legacy files when applicable
The "journal" code is much more compact in 6.4, and so is the "undo" files as a
result. However the previous version were much noisier, so let us cleanup undo
files from older version too.