Add unimplemented LBP3 login field (#495)

* Add unsupported LBP3 features

* Add GameApiExternal config url

* Add more exempt urls to digest check

* Make exemptPathList static

ProjectLighthouse.Servers.GameServer/Controllers/LoginController.cs

@@ -139,6 +139,7 @@ public class LoginController : ControllerBase
             {
                 AuthTicket = "MM_AUTH=" + token.UserToken,
                 ServerBrand = VersionHelper.EnvVer,
+                TitleStorageUrl = ServerConfiguration.Instance.GameApiExternalUrl,
             }.Serialize()
         );
     }