/usr/lib/x86_64-linux-gnu/libbsd.so is in libbsd-dev 0.6.0-2ubuntu1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /lib/x86_64-linux-gnu/libbsd.so.0.6.0
/lib/x86_64-linux-gnu/libbsd.so.0.6.0