Don't try to auto-configure network interfaces with no link.

We already start watching for link state changes, so as soon as a link
is established the configuration will be triggered.

src/servers/net/AutoconfigLooper.cpp

@@ -125,9 +125,13 @@ void
 AutoconfigLooper::_ReadyToRun()
 {
 	start_watching_network(B_WATCH_NETWORK_LINK_CHANGES, this);
+
+	BNetworkInterface interface(fDevice.String());
+	if (interface.HasLink()) {
 		_ConfigureIPv4();
 		//_ConfigureIPv6();	// TODO: router advertisement and dhcpv6
 	}
+}
 
 
 void