/etc/fonts/conf.d/66-lohit-tamil-classical.conf is in fonts-lohit-taml-classical 2.5.4-1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /etc/fonts/conf.d/../conf.avail/66-lohit-tamil-classical.conf
/etc/fonts/conf.d/../conf.avail/66-lohit-tamil-classical.conf