add network as member of Sprocket

src/MeshNet.cpp

@@ -35,6 +35,8 @@ void MeshNet::update(){
     // only needed when no scheduler was passed to mesh.init
     mesh.update();
 }
+
+// example, not used, to be removed
 void MeshNet::onReceive( std::function<void(uint32_t from, String &msg)> cb) {
     mesh.onReceive(cb);
 }