We don't need to use tcpserver/tcpclient.

Originally, I thought that I could get away with using one Redis
subscription and attach all the cogs processors to that.  Then I
realized:

1) If I wanted to use tcpserver, that wouldn't be possible: the only
   shared state between connections is whatever shared state separate
   instances of a given program have.

2) I really didn't want to write my own server.

3) It doesn't matter: 4-5 subscribers is really not noticably slower
   than one or two.

The server/client bits are therefore relics of premature optimization,
and you know what everyone says about that.