It's been a long time... My mail here [1] mentions two remaining open issues: a mention of QUIC and the code point. The first (small) issue seems to have been forgotten. I believe the second issue has been addressed by the WG, with the introduction of a new message type. [1] https://mailarchive.ietf.org/arch/msg/secdir/n54wuiSwCx9VqgSrrWvX_9FCoW0/