mod_delegation: use clean_xmlns to remove jabber:client namespace from node: for the same reason as in mod_privilege, `jabber:client` namespace is removed with the clean_xmlns method coming from there. Furthermore, the forwarded <iq> stanza use the `jabber:client` xmlns while the stanza may come from a component with e.g. `jabber:component:accept` xmlns, this can lead to inconsistencies between the <iq> stanza and children (like <error> element).

Module that generates a nicer text version of Atom feeds, meant for
use with [mod_pubsub_feeds] and [mod_pubsub_text_interface].

It extracts title, content and links from entries and formats a text
version like this:

> \***Example Post Title**\*
>
> Lorem ipsum dolor sit amet.
>
> https://blog.example.com/example-post