Provides auto-advance functionality on a playlist.
Auto-advance, when enabled, intercepts an END response and
automatically `select`s the next `select`able item in the playlist,
if available. Auto-advance thus skips over text items and other
non-playable playlist content.
Playlist.AutoAdvance depends on both End and Playlist.
Playlist.AutoAdvance may conflict with any other feature providing
auto-advance functionality.
autoadvance — set auto-advance modeautoadvance [on|off]