In the never ending quest of trying to satisfy every possible user
request for subtitle autoselection, I ended up redoing how
--subs-fallback-forced works. The old behavior had it as strictly a
fallback-type option when there were no lang matches, but now we can
make it an active part of compare_track and it works along with slang to
select the desired track. Since it's a three state option, the no option
still works to avoid selecting any forced subtitle tracks. The meaning
of always slightly changes to mean "only select forced subtitle tracks"
and yes remains essentially the same (no special priority given besides
the audio matching subtitle language case).
Dudemanguy
fe875083b3