various improvements

transport/config_test.go

@@ -56,7 +56,7 @@ func TestDefaultRetryConnectionConfig(t *testing.T) {
 		MaxRetries:   0,
 		InitialDelay: 1 * time.Second,
 		MaxDelay:     60 * time.Second,
-		JitterFactor: 0.5,
+		JitterFactor: 0.2,
 	})
 }