Byzantine node simulation

Hi @bobg ,

Interesting project you have here!

Does your code also simulate byzantine / faulty nodes? The protocol itself probably handles it, but I am wondering about the tests. Would it be hard to add a faulty node test, maybe in the `lunch.go` sample code?

Start by reading the `lunch.go` sample code and the existing protocol tests, if present, to understand how nodes are simulated. Define the faulty-node scenario and expected consensus behavior before adding a test; done means the test reliably demonstrates how the protocol handles Byzantine behavior.

Written by the indexing model from the issue text.