Add transport dial timeout

transport/http_transport.go

@@ -276,17 +276,19 @@ func (h *httpTransportListener) Accept(fn func(Socket)) error {
 }
 
 func (h *httpTransport) Dial(addr string, opts ...DialOption) (Client, error) {
-	conn, err := net.Dial("tcp", addr)
-	if err != nil {
-		return nil, err
+	dopts := DialOptions{
+		Timeout: DefaultDialTimeout,
 	}
 
-	var dopts DialOptions
-
 	for _, opt := range opts {
 		opt(&dopts)
 	}
 
+	conn, err := net.DialTimeout("tcp", addr, dopts.Timeout)
+	if err != nil {
+		return nil, err
+	}
+
 	return &httpTransportClient{
 		ht:       h,
 		addr:     addr,