Bug#898576: ytdl breaks m3u

[Juliusz Chroboczek]

Package: mpv
Version: 0.27.2-1

The flag ytdl is set by default, which breaks opening m3u playlists over
the network -- only the last entry of the playlist is played.  Running
with --ytdl=no works around the issue.

Also confirmed in 0.28.2-1.