/usr/share/doc/libtelnet-dev/changelog.Debian.gz is in libtelnet-dev 0.21-5.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/libtelnet-dev/../libtelnet2/changelog.Debian.gz
/usr/share/doc/libtelnet-dev/../libtelnet2/changelog.Debian.gz