/usr/lib/x86_64-linux-gnu/libvarconf-1.0.so is in libvarconf-dev 1.0.0-2ubuntu1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libvarconf-1.0.so.8.0.0
/usr/lib/x86_64-linux-gnu/libvarconf-1.0.so.8.0.0