Document wocky_porter_register_handler as it is subtle.
Document wocky_porter_register_handler as it is subtle.

We depend on the bare-jid-matches-all-resources behaviour, as do other parts
of wocky and/or gabble, so make sure it is recorded explicitly in the docs.

freedesktop-unofficial-mirror/wocky,freedesktop-unofficial-mirror/wocky,noonien-d/wocky,freedesktop-unofficial-mirror/wocky,noonien-d/wocky,noonien-d/wocky