In acac614032, I sort of cargoculted what
I had to do for m3u, but it's actually not needed. bstr_split_tok
unexpectedly doesn't modify the original string. So the line_dup
business in the ini parsing is not needed. Remove it. The part in
parse_ref_init isn't wrong but naming the variable "line_dup" instead of
"value" is stupid so adjust that. And finally, you can actually force a
codepage in mpv (add "+" before the codepage) which will cause every
line to be allocated memory including the header lines even though those
are obviously valid utf8 that should never need conversion. This wasn't
taken into account so add an extra pl_free_line in a couple of places to
make sure they are freed.