/usr/lib/ufoai-server/base/0maps.pk3 is in ufoai-server 2.5-3.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/ufoai-server/base/../../../share/games/ufoai/base/0maps.pk3
/usr/lib/ufoai-server/base/../../../share/games/ufoai/base/0maps.pk3