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> New config options may not change behavior (if default value preserves
> behavior), they still make documentation more incomplete (doc, books,
> and/or blogposts about Juno won't mention that option).

That's why we definitely need such changes described clearly in stable
release notes.
I also lean to accept this as an exception for stable/juno, I'll
request relnote text in the review.

Cheers,
Alan