summary: MITM when used without DNSSEC
If not using DNSSEC it is trivial to perform a man in the middle attack a
client via DNS spoofing. You can find more discussion in the
[XMPP Standards Archives](https://mail.jabber.org/pipermail/standards/2022-February/038759.html).
Removed the code that supported the `_xmppconnect` DNS TXT record.