/usr/lib/debian-med/share/man/man1/plink.1.gz is in plink 1.07-7.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/debian-med/share/man/man1/../../../../../share/man/man1/p-link.1.gz
/usr/lib/debian-med/share/man/man1/../../../../../share/man/man1/p-link.1.gz