[tor-relays] can dirport be disabled on fallback directory?

[Damian Johnson]

> There don't seem to be any examples of ORPort endpoints in the Stem
> repository. I think Dave plans to add some more documentation as part of Tor
> Summer of Privacy.

Oh interesting. You're right. I recently added Stem's ORPort
capabilities but seems I forgot to add usage examples in the docs.
Thanks for pointing that out, I'll add it to my todo list. In the
meantime I provided an example here...

https://blog.atagar.com/april2018/