func (rc *raftNode) stop() {
	rc.stopHTTP()
	close(rc.commitC)
	close(rc.errorC)
	rc.node.Stop()
}
func (rc *raftNode) stop() {
	rc.stopHTTP()
	close(rc.commitC)
	close(rc.errorC)
	rc.node.Stop()
}
// stop closes http, closes all channels, and stops raft.