/usr/share/man/man7/net-device-added.7.gz is in upstart 1.11-5.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/man/man7/../man8/upstart-udev-bridge.8.gz
/usr/share/man/man7/../man8/upstart-udev-bridge.8.gz