Good news! The HKP draft has been adopted by the IETF #OpenPGP Working Group, the first official step towards publication as an RFC 🤩
It is now known as draft-IETF-openpgp-hkp, which replaces draft-gallagher-openpgp-hkp, which itself replaced draft-shaw-openpgp-hkp.
It has been a long couple of decades 😂
https://datatracker.ietf.org/doc/html/draft-ietf-openpgp-hkp

OpenPGP HTTP Keyserver Protocol
This document specifies a series of conventions to implement an OpenPGP keyserver using the Hypertext Transfer Protocol (HTTP). As this document is a codification and extension of a protocol that is already in wide use, strict attention is paid to backward compatibility with these existing implementations.
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