Authenticated *nix pipes over ssh
The simplest authenticated pubsub system. Send messages through user-defined topics (aka channels). By default, topics are private to the authenticated ssh user. The default pubsub model is multicast with bidirectional blocking, meaning a publisher (pub) will send its message to all subscribers (sub) for a topic. There can be many publishers and many subscribers on a topic. Further, both pub and sub will wait for at least one event to be sent or received on the topic.
Send command output through our pipe command. The pipe command is just like pub except it is non-blocking and also acts like a sub. So a client that can read and write to the topic.
I'm always looking for easy ways to simplify deploying apps automatically. Having an authenticated, zero-install event system seems handy for this purpose.
You must always pipe something into pub or else it will block indefinitely until the process is killed. However, you can provide a flag to send an empty message: pub xyz -e.
