Multi-disc DiscSubtitle sorting

[simoncn]

For the Artist index, MinimServer uses the AlbumArtist tag if it is present (not present in your case because of the conflict) and Artist tags otherwise (present in your case). This will happen no matter how many Artist tags your album has.

For the AlbumArtist index, MinimServer uses the AlbumArtist tag only (not present in your case because of the conflict).

For the All Artists index, MinimServer uses Artist tags only.