mod_pubsub_summary: Fix to not strip inline links Links were turned into `label <url>` and then a later pass removed the `<url>` part leaving only the label. This should avoid that. Escaping is hard.

This module blocks configured queries that change server state.

E.g. to make vCard storage read-only:

``` lua
readonly_stores = {
	vcard = { "vcard-temp", "vCard" };
}
```