This adds an option for specifying a routed network. Every node route
that belongs to that routed network will be announced to the cluster and
every other node will direct traffic to that node for said route.
This means nodeMeta can be private again, and also makes it
easier to pass a Node object to the cluster for local meta,
instead of a generic byte[] function.
For later updating, that node is passed using Update() instead
of New().
kaiyou