Support TLS/HTTPS in maiden

[Dewb]

Looks like https://github.com/gin-gonic/autotls is a drop-in addition to support TLS and redirection from HTTP urls to HTTPS.

[ngwese]

This has been on the wish list for some time. The primary reason it hasn't been done was that we wanted to also switch to using TLS for the websocket connections which the repl uses. The websocket server for repl traffic historically was provided via nanomsg which doesn't support TLS. On the converged branch nanomsg was replaced with nng in order to be able to support TLS for the repl as well.

[Dewb]

Yup, we have an issue for securing websockets over here: monome/norns#1898

I was thinking these projects could be pursued independently (and I tagged this "good first issue") but of course you cannot open insecure websockets from a HTTPS context, so this can't be done until the secure websocket setup is complete (the first phase of 1898.)