Consulting 
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=761658, I
am able to hazard a guess at the answer to this question:
> Any idea which... talented person wrote that changeset for the system
> resolver?  And how I avoid sharing cities, time zones, preferably
> continents, etc. with him/her?  ;->
Quoting the bug header:
   Package: systemd
Aha.  It's in systemd-resolved.  Thereby reducing the discussion to a
previous stupidity.  ;->  #include "dumbass-arrogant-destkop-coders.h"