mod_pubsub_serverinfo: Fix check for local domain The module was checking whether a host exists, but this may be misleading if our host is loaded before the host that is being checked. This change makes it check the config. This will provide a false positive in the rare case that the host is defined but not activated/enabled. But we don't have an API currently for "is this host configured and enabled?"

---
labels:
- 'Stage-Merged'
summary: Advertise an external TURN service
...

::: {.alert .alert-info}
This module has been merged into Prosody since version 0.12,
see [mod_turn_external][doc:modules:mod_turn_external].
:::