It seems like this behavior should be documented in a man page somewhere, probably route(4). The change seems sensible, but it opens up a question of what the invariant is. I think it's something like all configured addresses which are not tentative have had a NEWADDR sent (that has not been withdrawn by a DELADDR). Basically, I'd like a spec of how to take a stream of NEW/DEL and a set of current addresses and say if the behavior is right. I don't mean to suggest that you've done anything that breaks what the spec ought to be, but it feels tricky.
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