(GH-959) Fix: Licensed feed cannot be disabled

Allow the licensed feed to be found, even if it is disabled, so that
the source doesn't attempt to create a new one. Note the comments
mention that it should allow the user to disable the source, but the
code was not respecting that option.

src/chocolatey/infrastructure.app/builders/ConfigurationBuilder.cs

@@ -110,7 +110,7 @@ private static void add_or_remove_licensed_source(ChocolateyLicense license, Con
         {
             // do not enable or disable the source, in case the user has disabled it
             var addOrUpdate = license.IsValid;
-            var sources = configFileSettings.Sources.Where(s => !s.Disabled).or_empty_list_if_null().ToList();
+            var sources = configFileSettings.Sources.or_empty_list_if_null().ToList();
 
             var configSource = new ConfigFileSourceSetting
             {