Stephen Borrill <netbsd@precedence.co.uk> writes:

> I'm happy to commit the option part, but could you point me at some
> documentation about the NS_AGENTS being deprecated? Might it be better
> to stop ejabberd failing when faced with such a thing?

http://www.xmpp.org/extensions/xep-0094.html
XEP-0094: Agent Information
Last Updated: 2003-10-08

The problem is that centericq treats some error replies as pertaining
to authentication.  Previously ejabberd sent "feature-not-implemented"
for unknown requests, but now it sends "service-unavailable", as
required by the RFC.  centericq has a workaround to ignore the former
error, but not the latter.  Therefore it believes that authentication
has failed (which is not the case).

Magnus