add 'network' permission

src/engine/Engine.hpp

@@ -3,13 +3,12 @@
 #include "CoreParameters.hpp"
 #include "PostRunnables.hpp"
 #include "Time.hpp"
-#include "delegates.hpp"
 #include "settings.hpp"
-#include "typedefs.hpp"
 #include "util/ObjectsKeeper.hpp"
 
 #include <memory>
 #include <string>
+#include <optional>
 
 class Assets;
 class ContentControl;
@@ -161,8 +160,8 @@ public:
         return *window;
     }
 
-    network::Network& getNetwork() {
-        return *network;
+    network::Network* getNetwork() {
+        return network.get();
     }
 
     cmd::CommandsInterpreter& getCmd() {