Whether this is a bad-request (missing XML attributes or elements) or an
internal server error.

If we never succeeded our connection+auth process, means we should probably
not attempt any-more, and just give up.  If we ever did, this means a
reconnect is a good idea

This reverts commit e3b91475.

fixes #2436

Also remove the duplicate send_self_join methods, user only send_user_join

By fixing a namespace when looking for an XML element containing that message

The generated XML is very verbose because each IRC formatting tag makes us
close a <span/> element and reopen it with the new style applied.  However,
this works quite well and is easy to implement.