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-Obsolete'
---

::: {.alert .alert-warning}
As of Prosody 0.12.x, `prosodyctl shell user list HOST` can be used
instead of this module.
:::

This module adds a command to `prosodyctl` for listing users.

``` sh
prosodyctl mod_listusers
```