first murmurs of ethernet support

src/network-stubs.cpp

@@ -0,0 +1,27 @@
+#include "configuration.h"
+
+#if (HAS_WIFI == 0)
+
+bool initWifi(bool forceSoftAP) {
+    return false;
+}
+
+void deinitWifi() {}
+
+bool isWifiAvailable() {
+    return false;
+}
+
+#endif
+
+#if (HAS_ETHERNET == 0)
+
+bool initEthernet() {
+    return false;
+}
+
+bool isEthernetAvailable() {
+    return false;
+}
+
+#endif