/etc/fonts/conf.d/20-fix-globaladvance.conf is in fontconfig-config 2.9.0-7.1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /etc/fonts/conf.d/../conf.avail/20-fix-globaladvance.conf
/etc/fonts/conf.d/../conf.avail/20-fix-globaladvance.conf