MainSettings: Add setting to control Wii NUS Shop URL for system updates

Source/Core/Core/Config/MainSettings.cpp

@@ -210,6 +210,9 @@ const Info<bool> MAIN_ENABLE_SAVESTATES{{System::Main, "Core", "EnableSaveStates
 const Info<bool> MAIN_REAL_WII_REMOTE_REPEAT_REPORTS{
     {System::Main, "Core", "RealWiiRemoteRepeatReports"}, true};
 
+// Empty means use the Dolphin default URL
+const Info<std::string> MAIN_WII_NUS_SHOP_URL{{System::Main, "Core", "WiiNusShopUrl"}, ""};
+
 // Main.Display
 
 const Info<std::string> MAIN_FULLSCREEN_DISPLAY_RES{

Source/Core/Core/Config/MainSettings.h

@@ -131,6 +131,7 @@ extern const Info<bool> MAIN_ENABLE_SAVESTATES;
 extern const Info<DiscIO::Region> MAIN_FALLBACK_REGION;
 extern const Info<bool> MAIN_REAL_WII_REMOTE_REPEAT_REPORTS;
 extern const Info<s32> MAIN_OVERRIDE_BOOT_IOS;
+extern const Info<std::string> MAIN_WII_NUS_SHOP_URL;
 
 // Main.DSP
 

Source/Core/Core/WiiUtils.cpp

@@ -458,11 +458,18 @@ OnlineSystemUpdater::Response OnlineSystemUpdater::GetSystemTitles()
   doc.save(stream);
   const std::string request = stream.str();
 
-  // Note: We don't use HTTPS because that would require the user to have
-  // a device certificate which cannot be redistributed with Dolphin.
-  // This is fine, because IOS has signature checks.
+  std::string base_url = Config::Get(Config::MAIN_WII_NUS_SHOP_URL);
+  if (base_url.empty())
+  {
+    // Note: We don't use HTTPS because that would require the user to have
+    // a device certificate which cannot be redistributed with Dolphin.
+    // This is fine, because IOS has signature checks.
+    base_url = "http://nus.shop.wii.com";
+  }
+
+  const std::string url = fmt::format("{}/nus/services/NetUpdateSOAP", base_url);
   const Common::HttpRequest::Response response =
-      m_http.Post("http://nus.shop.wii.com/nus/services/NetUpdateSOAP", request,
+      m_http.Post(url, request,
                   {
                       {"SOAPAction", "urn:nus.wsapi.broadon.com/GetSystemUpdate"},
                       {"User-Agent", "wii libnup/1.0"},