Open to LAN additions: Enable uPnP and MOTD

In the last snapshot (22w45a) in open to LAN it became possible to select a port. It would be great if you could also enable use uPnP to open the port automatically, so people can easily play with each other without using third party services (hamachi or radmin)! It would also be nice to be able to set a custom MOTD, set allowing command blocks, use commands (it already exitst in /publish command)