Given `proxy` & `router` processes have been merged, `launch-proxy`,
`launch-router`, `stop-proxy`, `stop-router` do not make sense any more, and
should just be `launch` and `stop` with the appropriate flags.
The intention, per the comments, is that host1 should claim from host2.
But host2 and host3 can carve up the space either way round. If host1
claims from host3 then there is a race whether anyone finds out about
it.
Adding a 'prime' on host2 ensures the space is all owned by host2 at that point.
Marc CARRE