Only send hello message to non-JSON clients

cmd/bgammon-server/client_websocket.go

@@ -100,7 +100,7 @@ func (c *webSocketClient) writeEvents(closeWrite chan struct{}) {
 
 	setTimeout()
 	var event []byte
-	for event = range c.events {
+	for {
 		select {
 		case <-closeWrite:
 			for {

cmd/bgammon-server/server.go

@@ -272,6 +272,9 @@ func (s *server) randomUsername() []byte {
 }
 
 func (s *server) sendHello(c *serverClient) {
+	if c.json {
+		return
+	}
 	c.Write(s.welcome)
 }