Milestone 3
* client sends only new-style messages
+Milestone 3.5
+ * offer to Derrick.
+
Milestone 4
* server sends only newstyle messages, and can't brain dump the
new keys. (this tests the codepath opened in milestone 1)
* zhm can figure out what sort of realm it's talking to, and
communicate this to the client.
--send to derrick-
+Milestone 6.5
+ * Send this to Derrick.
Milestone 7
* brain dump via krb5, encrypted