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'
summary: 'Connection-level rate limiting'
superseded_by: mod_limits
...

Since Prosody 0.10, this module is [included in Prosody](https://prosody.im/doc/modules/mod_limits), you will be redirected there shortly.