/usr/lib/x86_64-linux-gnu/libunistring.so.0 is in libunistring0 0.9.6+really0.9.3-0.1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libunistring.so.0.1.2
/usr/lib/x86_64-linux-gnu/libunistring.so.0.1.2