- Nodes not being removed when deleted because when node gossips again
it is readded.
- Keep track of highest vector clock we have removed and used this as a
mark for determining if something is stale.
Keepalive is based on per mesh and not per node.
Using total ordering mechanism similar to paxos to elect a leader
if leader doesn't update it's timestamp within 3 * keepAlive then
give the leader a gravestone and elect the next leader.
Leader is bassed on lexicographically ordered public key.
