> This commit message doesnʼt use the ChangeLog format.

Ahh, I was just informally pattern matching other commit messages I
had seen in your repo. Now I've read [1] (I really like those rules,
will adopt them for other projects too). Nevertheless I'm still unsure
about how to format the notes that go below the actual changes.

Please, tell me what do you think about the new commit message.

> For the rest, it looks ok. Do you plan to make the changes to actually
> use the rif interface as part of the same patch?

No, those are part of bug#37689 [2].

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[1] https://www.gnu.org/prep/standards/html_node/Change-Logs.html#Change-Logs
[2] https://debbugs.gnu.org/cgi/bugreport.cgi?bug=37689