[tor-relays] Grafana dashboards

Yesterday I stumbled together 2-3 dashboards [1] for Tor relay(s), Tor Snowflake(s) and the DDoS solution [2]. Feedback is welcome. [1] https://github.com/toralf/torutils/tree/main/dashboards [2] https://github.com/toralf/torutils/tree/main -- Toralf