add option to prefer directlinks

ModpackUpdater.Manager/ModpackFactory.cs

@@ -66,7 +66,7 @@ public class ModpackFactory
                 var releases = await github.Repository.Release.GetAll(repo.Id);
                 return releases.Select(r => new KeyValuePair<string, string>(r.Name ?? r.TagName, r.TagName)).ToArray();
             }
-            catch (Exception ex)
+            catch (Exception)
             {
             }
         }