Update metadata.rs
Update metadata.rs

Properly check forbidden and allowed lists, skip tracks where allowed list is set but is empty.
plietar/librespot,michaelherger/librespot,bobbo/spotify-connect-scrobbler,XDjackieXD/librespot,bobbo/spotify-connect-scrobbler,plietar/librespot,michaelherger/librespot,XDjackieXD/librespot,plietar/spotify-connect