- changes lastResponse from plain int64 to atomic.Int64 in both router
and peer heartbeat callbacks, fixing a data race between the heartbeat
response handler and the heartbeat check ticker
- fixes peer heartbeat logger channelType from "router" to "peer"
Adds config to controller for heartbeat config
Add config to routers for heartbeat config
Adds configurable heartbeats to controller <-> controller connections
Add more raft config knobs
Refactor peer handles to be consistent with other handlers
Allow inspect to work across controllers
Add config and clusterconfig inspect support
Paul Lorenz