- Reworks how a `hyper::Server` is created, to get access to the local
  address before starting the server itself. This allows it to be put
  into the key-value pairs for the server's logger, so they're printed
  on each subsequent message.
- Updates the internal connection/request handler types to get the
  remote address and store it in the logger passed to the request
  handling functions. The remote address is also printed on each
  subsequent log message.