You don't need to do a "deprecate" per se to do this. You just need to do an "updates" as far as I know.
Well, that's what I was thinking (but didn't say it). I meant deprecate the text and not the spec.
Another protocol that I believe would want a 0 checksum is if you want to use UDP-ESP (RFC 3948) across a NAT64.
Yep. But can you kill NAT64? Dino