Can we add a new metrics related to '$upstream_connect_time' for prometheus-nginxlog-exporter.

[Ais18]

In 'log_format' we use '$upstream_connect_time', but this is not been used by any of the predefined metrics in prometheus-nginxlog-exporter. So to monitor the connect time is it possible to add a metrics for '$upstream_connect_time' .

Thanks

[martin-helmich]

Thanks for the (very reasonable) suggestion! I've created #252 to track this feature request and see if I'll get around to implementing this some time soon (in the mean time, PRs are welcome 🙂).