xmpp4r/xmpp4r — pull request #34 by Flowdalic (2014-09-05 15:19:09+00:00)
Title: Don't send authzid when performing SASL PLAIN

It's not allowed to use the authzid when it's no required according to
RFC 6120 6.3.8:

If the initiating entity does not wish to act on behalf of another
entity, it MUST NOT provide an authorization identity.

Fixes # 33