The join protocol is now (in theory) up and running. I don't trust rsync
totally, so I have that commented out (it'll just print out the command
instead). Hosts now ping each other periodically.

In order for rsync to work, you MUST be able to ssh between hosts by simply
typing "ssh host2". It must work without prompting the user for anything.
Because I have special ssh settings, I had to set them up in my ".ssh" file.

Soon I'll get on to actually doing the file system commands. But that's very
tedious.