switch.go
func (sw *Switch) StopPeerGracefully(peer *Peer) {
	log.Notice("Stopping peer gracefully")
	sw.stopAndRemovePeer(peer, nil)
}
func (sw *Switch) StopPeerGracefully(peer *Peer) {
	log.Notice("Stopping peer gracefully")
	sw.stopAndRemovePeer(peer, nil)
}
// Disconnect from a peer gracefully.
// TODO: handle graceful disconnects.