/usr/share/doc/libcomedi-dev/modules.conf is in libcomedi-dev 0.10.2-4.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/libcomedi-dev/../libcomedi0/modules.conf
/usr/share/doc/libcomedi-dev/../libcomedi0/modules.conf