/usr/lib/x86_64-linux-gnu/liblua5.1-dbi-postgresql.so is in lua-dbi-postgresql-dev 0.5.hg5ba1dd988961-4.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/liblua5.1-dbi-postgresql.so.0.0.0