Milestone 3 (done)
* client sends only new-style messages
-Milestone 3.5 (in progress)
+Milestone 3.5 (in progress) [done?]
* refactor checksumming code
-Milestone 4
+Milestone 4 [done?]
+ * Desired end state that server uses the old checksum for single-des keys,
+ and new checksum for everything else, thus the first clause in the
+ following is obsolete:
+ This may be the case, someone needs to check.
* server sends only newstyle messages, and can't brain dump the
new keys. (this tests the codepath opened in milestone 1)