have server ignore required server version on update check

MediaBrowser.ServerApplication/ApplicationHost.cs

@@ -650,7 +650,16 @@ namespace MediaBrowser.ServerApplication
         {
             var availablePackages = await InstallationManager.GetAvailablePackagesWithoutRegistrationInfo(cancellationToken).ConfigureAwait(false);
 
-            var version = InstallationManager.GetLatestCompatibleVersion(availablePackages, Constants.MbServerPkgName, ApplicationVersion, ConfigurationManager.CommonConfiguration.SystemUpdateLevel);
+            var package = availablePackages.FirstOrDefault(p => p.name.Equals(Constants.MbServerPkgName, StringComparison.OrdinalIgnoreCase));
+
+            if (package == null)
+            {
+                return null;
+            }
+
+            var version = package.versions
+                .OrderByDescending(v => v.version)
+                .FirstOrDefault(v => v.classification <= ConfigurationManager.CommonConfiguration.SystemUpdateLevel);
 
             return version != null ? new CheckForUpdateResult { AvailableVersion = version.version, IsUpdateAvailable = version.version > ApplicationVersion, Package = version } :
                        new CheckForUpdateResult { AvailableVersion = ApplicationVersion, IsUpdateAvailable = false };