mod_sasl2: Further break up success handling, into pre/post stream:features This allows us to enable mod_smacks after sending success, but before sending stream:features. Previously, the features were being calculated before SM was finalized on the session. We can't finalize SM before sending <success> because it may generate stanzas.

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