gossip_channel.go
func (c *gossipChannel) GossipBroadcast(update GossipData) {
	c.relayBroadcast(c.ourself.Name, update)
}
func (c *gossipChannel) GossipBroadcast(update GossipData) {
	c.relayBroadcast(c.ourself.Name, update)
}
// GossipBroadcast implements Gossip, relaying update to all members of the
// channel.