TLS certificate rotation

[kixelated]

moq-relay supports loading TLS certificates from disk. This is cool, but certificates expire and need to be rotated every month or so.

It would be nice if there way a way to reload these certificates without restarting the process. I'm thinking either:

1. Reload the configuration on SIGUSR1 or something. systemctl reload moq-relay could send it.
2. Watch the filesystem and reload certificates on change.

[kixelated]

Also I can share my latest setup that uses Nix + systemd + certbot on Linode. Otherwise it'll be difficult to test.

[einrobin]

Hey @kixelated I'd like to work on this feature, can you please assign the issue to me?