PMG and Grafana Stats with InfluxDB status.cfg

So that the FR has changed to WANTFIX some time ago. Maybe this info can be usefull. Some basic stats can be obtained with prometheus-postfix-exporter and used in grafana right away. There is a neat little dashboard called 'Postfix' available (ID 10013) which i'am using myself. With a prometheus remote_write to telegraf and an telegraf output directive, you can also write the metrics into influxdb on the fly. With the starlark processor enabled in the telegraf agent, the metrics have the original prometheus metrics name instead of "prometheus_remote_write". More info can found in the Influx documentation.