There is code for using relays over HTTP at https://github.com/syncthing/syncthing-lite/blob/master/syncthing-http-relay-client/src/main/kotlin/net/syncthing/java/httprelay/HttpRelayConnection.kt but I could not find the documentation of this HTTP relay protocol and I couldn’t find any code related to it at the relay server code.
The only thing I’ve found is https://forum.syncthing.net/t/proposal-relay-protocol-over-https/8643/5, but this is only the idea and not how it is implemented.
Does this http relaying still exist?