udev: verify netdev index and update name at start

When discovering udev device-ready state at start, verify that the
device index in the udev event data is equal to the index we query
and update device names if needed as we don't handle events yet.

server/main.c

@@ -300,7 +300,13 @@ run_interface_server(void)
 void
 discover_udev_netdev_state(ni_netdev_t *dev)
 {
-	if (dev && ni_udev_netdev_is_ready(dev->name))
+	if (!dev || ni_netdev_device_is_ready(dev))
+		return;
+
+	if (ni_netdev_device_always_ready(dev))
+		dev->link.ifflags |= NI_IFF_DEVICE_READY;
+	else
+	if (ni_udev_netdev_is_ready(dev))
 		dev->link.ifflags |= NI_IFF_DEVICE_READY;
 }