Doesn't work for torrents with RAR/ZIP files. The ref-link is also one-way. If I have existing content on my disk, and want to (partially) seed a torrent - can'

Doesn't work for torrents with RAR/ZIP files. The ref-link is also one-way. If I have existing content on my disk, and want to (partially) seed a torrent - can't do that easily. I'd like a way to say: "Everything inside /public is public-domain content, seed it against any valid torrent if someone shows up with a valid hash"