Make statsd optional

[jcoatgoogle]

It should be possible to run this without the statsd logging (there may be some environment magic to do this? otherwise we can use dependency injection, but it seems like the sort of library that they'd have a hook to turn off)

[kamalmarhubi]

It would also be nice to be able to plug in other metrics systems. In particular I'd be interested in Prometheus support if I ever deployed Envoy.

[spullara]

@kamalmarhubi you can use this for that: https://github.com/prometheus/statsd_exporter

[mikecutalo]

Thank you for you contribution to this repository.

Closing this Issue as this repository is being archived.