Merge branch 'backoff-retry' of dan/cwtch into master

protocol/connections/connectionsmanager.go

@@ -99,7 +99,9 @@ func (m *Manager) GetPeerServerConnectionForOnion(host string) (psc *PeerServerC
 
 // AttemptReconnections repeatedly attempts to reconnect with failed peers and servers.
 func (m *Manager) AttemptReconnections() {
-	timeout := time.Duration(0) // first pass right away
+	maxTimeout := time.Minute * 5
+	//  nearly instant first run, next few runs will prolly be too quick to have any FAILED and will gracefully slow to MAX after that
+	timeout := time.Millisecond * 500
 
 	for {
 		select {
@@ -120,8 +122,11 @@ func (m *Manager) AttemptReconnections() {
 			}
 			m.lock.Unlock()
 
-			// Launch Another Run In 30 Seconds
-			timeout = time.Duration(30 * time.Second)
+			if timeout < maxTimeout {
+				timeout = timeout * 2
+			} else {
+				timeout = maxTimeout
+			}
 		case <-m.breakChannel:
 			return
 		}

protocol/connections/peerserverconnection.go

@@ -102,7 +102,7 @@ func (psc *PeerServerConnection) SendGroupMessage(gm *protocol.GroupMessage) err
 
 	errCount := 0
 	for errCount < 5 {
-		time.Sleep(time.Second * 1)
+		time.Sleep(time.Second * time.Duration(errCount+1)) // back off retry
 		err = psc.connection.Do(func() error {
 			channel := psc.connection.Channel("im.cwtch.server.send", channels.Outbound)
 			if channel == nil {