Like mentioned on the review at
https://github.com/profanity-im/profanity/pull/1605 I don't ge why
@DebXWoody changed the code like he did.
I changed it to something that made more sense to me now.
Instead of looking for headline in two places and checking for pubsub in
a headline place (only).
I didn't check this deeply. And still have a feeling that this is not
the best way to go. But I didn't read the XEP yet.
Added a TODO to the code regarding this too.
A quick skimming through https://xmpp.org/extensions/xep-0107.html
doesn't show me anything regarding headline. So I really don't see why
this needs to go here.
Hopefully @DebXWoody checks this in the future. But since he didn't
react on the PR I decided to make some adjustments myself so we can
merge it.
6c3e6a5262