mpv-player/mpv — pull request #613 by paulguy (2014-03-04 21:37:17+00:00)
Title: Allow accepting true/false and on/off for flag properties.

I figured it'd be more intuitive to allow true/false as well as on/off
for flag properties in addition to yes/no, seeing as they're common
synonyms for boolean types and true/false was the first thing I tried
when messing with input.conf before looking up what the correct keywords
were.