Draft: Bodge two hash sizes

On top of !1240 (merged).

Emprically, with this, I can make an HS connection with

curl --socks5-hostname localhost:9150 https://duckduckgogg42xjoc72x3sjasowoarfbgcmvfimaftt6twagswzczad.onion/

and get a response!

Sharing this not because we want to merge this but so everyone else can play :-).