/usr/share/doc/wpagui/changelog.Debian.gz is in wpagui 2:2.6-15ubuntu2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/wpagui/../wpasupplicant/changelog.Debian.gz
/usr/share/doc/wpagui/../wpasupplicant/changelog.Debian.gz