/usr/lib/pd/extra/pddp/LICENSE.txt is in pd-pddp 0.2.1-1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/pd/extra/pddp/../../../../share/common-licenses/GPL-2
/usr/lib/pd/extra/pddp/../../../../share/common-licenses/GPL-2