/usr/share/doc/libjack-jackd2-dev/TODO is in libjack-jackd2-dev 1.9.9.5+20130622git7de15e7a-1ubuntu1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/libjack-jackd2-dev/../libjack-jackd2-0/TODO