Log joined nodes

[kellabyte]

When a new node joins you see this in the logs:

INFO[0001] bootstrap complete                            joined=[127.0.0.1:3000]

On 127.0.0.1:3000 the first node of the cluster there's nothing in the logs indicating a new node joined. A similar log entry would be nice on the seed node. I suggest not using joined for both log entries because it will be difficult to write automated log parsing that could distinguished between a new bootstrapping node vs a seed node receiving a new joined node.