QXmpp-dev is a "feature fork" of the QXmpp library, with additional features
and patches to the QXmpp core. For example, the following is implemented,
among other features:
* In-band registration.
* XEP-0033: Extended Stanza Addressing.
* XEP-0145: Roster Annotations.
* Support of more number of vCard attributes.
* Setting dataforms in disco#info (allows implementing XEP-0232).
* Extended Roster management API, with reason texts for subs.
* Fixed presence verification string generation.
* Support for XEP-0249 is advertised in features.