/usr/lib/x86_64-linux-gnu/libcitadel.so.4 is in libcitadel4 917-2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libcitadel.so.4.0.917
/usr/lib/x86_64-linux-gnu/libcitadel.so.4.0.917