Log Tor relay names to detect failing bridges

This branch logs the names of Tor guards and bridges that we directly connect to, to improve our ability to debug connection issues from user feedback. I'm adding this because I received a log from a user in Belarus where it was clear that bridge connections were failing, but not clear which bridges were being tried each time.

The orName that gets logged is a 40 hex character fingerprint, followed by the relay's name (e.g. moria1) if it has one.