See above, there's a rendezvous server running at happyfuntimes.net that redirects them
Each game needs a cert. There might be thousands of people running or developing games. In order for HTTPS to work it need to be associated with a domain. So I need to run a public dynamic dns server, make up a subdomain for each game, get a cert for that domain, send the cert to that game so it can serve the cert, point the subdomain to their local-ip-address, then have the rendezvous server redirect players to that domain instead of what it does now which is redirect to http://<local-ip-address-of-machine-running-game>
All of this was covered in the other thread as well as the plex article linked above.