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?"

---
summary: Cache Bits of Binary on MUC services
rockspec:
  dependencies:
    - mod_cache_c2s_caps
---

Description
===========

This module extracts cid: URIs (as defined in XEP-0231) from messages, and
replies with their content whenever another client asks for the actual data.

Usage
=====

```lua
Component "rooms.example.org" "muc"
	modules_enabled = {
		"bob";
		...
	}
```