This diff forward ports 261d1a4cdc88522f6a8f63d6c540f51054566b28 to master
whose original commit message follows:
- - -
It's not working for me from a couple of places and also it does not
seem to be documented upstream, see:
https://docs.namebase.io/guides-1/resolving-handshake-1/hdns.io
This diff WILL need to be forwardported to master.