This quest to discover XEP-0233 (XMPP Server Registration for use with Kerberos V5) was automagically added, to fulfill the quest at Discover XEPs. As of 2017-03-16 the status of this Standards Track XEP is Draft. What does that even mean?! Check it out at XEP-0233: XMPP Server Registration for use with Kerberos V5 