API: Fix logging of dynamic listening port (#19644)
API: Fix logging of dynamic listening port (#19644)

Logs the real (dynamic) HTTP port when configured 
Grafana using setting.HttpPort = 0.

Fixes #16709
grafana/grafana,grafana/grafana,grafana/grafana,grafana/grafana,grafana/grafana,grafana/grafana,grafana/grafana