Avoid an error when formatting remote data

[schneiderderek]

We're running into 2 issues:

The first where :inet.ntoa() is returning {:error, :einval} causing the |> to_string call to blow up. This change checks the return of :inet.ntoa/1 before passing it to to_string/1 to avoid the above situation.

The second where Plug.Conn.get_peer_data is returning an error tuple.

[mitchellhenke]

Thank you for the contribution! 💖