Generally I’m of the opinion that it’s better to get patches to other people’s projects merged upstream whenever feasible; accordingly I submitted the LibreTorNS patches upstream. Happily, meejah has merged the LibreTorNS patches to upstream TorNS. That means LibreTorNS is now obsolete, and you should use meejah’s upstream TorNS for testing dns-prop279 going forward.
Huge thanks to meejah for accepting the patch! Also thanks to meejah for the code review – there was a bug hiding in my initial submitted patch, which is one of the reasons I always prefer getting things reviewed by upstream.