/usr/share/ is in postgresql-9.1-pgpool2 3.1.1-1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/doc/
/usr/share/doc/postgresql-9.1-pgpool2/
/usr/share/doc/postgresql-9.1-pgpool2/copyright
/usr/share/postgresql/
/usr/share/postgresql/9.1/
/usr/share/postgresql/9.1/extension/
/usr/share/postgresql/9.1/extension/pgpool_adm.control
/usr/share/postgresql/9.1/extension/pgpool_adm--1.0.sql
/usr/share/postgresql/9.1/contrib/
/usr/share/postgresql/9.1/contrib/pgpool-recovery.sql
/usr/share/postgresql/9.1/contrib/uninstall_pgpool-recovery.sql
/usr/share/postgresql/9.1/contrib/pgpool-walrecrunning.sql
/usr/share/postgresql/9.1/contrib/uninstall_pgpool-walrecrunning.sql
/usr/share/postgresql/9.1/contrib/uninstall_pgpool-regclass.sql
/usr/share/postgresql/9.1/contrib/pgpool-regclass.sql
/usr/share/doc/postgresql-9.1-pgpool2/changelog.Debian.gz