Added indexer flags to the list of environmental variable for customs scripts (on grab) (#2801)

Fixes #1282

src/NzbDrone.Core/Notifications/CustomScript/CustomScript.cs

@@ -45,6 +45,7 @@ namespace NzbDrone.Core.Notifications.CustomScript
             environmentVariables.Add("Radarr_Release_ReleaseGroup", remoteMovie.ParsedMovieInfo.ReleaseGroup ?? string.Empty);
             environmentVariables.Add("Radarr_Release_Quality", quality.Quality.Name);
             environmentVariables.Add("Radarr_Release_QualityVersion", quality.Revision.Version.ToString());
+            environmentVariables.Add("Radarr_IndexerFlags", remoteMovie.Release.IndexerFlags.ToString());
 
             ExecuteScript(environmentVariables);
         }