/usr/ is in rsyslog-pgsql 8.32.0-1ubuntu4.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/
/usr/lib/x86_64-linux-gnu/
/usr/lib/x86_64-linux-gnu/rsyslog/
/usr/lib/x86_64-linux-gnu/rsyslog/ompgsql.so
/usr/share/
/usr/share/dbconfig-common/
/usr/share/dbconfig-common/data/
/usr/share/dbconfig-common/data/rsyslog-pgsql/
/usr/share/dbconfig-common/data/rsyslog-pgsql/install/
/usr/share/dbconfig-common/data/rsyslog-pgsql/install/pgsql
/usr/share/doc/
/usr/share/doc/rsyslog-pgsql/
/usr/share/doc/rsyslog-pgsql/copyright
/usr/share/rsyslog-pgsql/
/usr/share/rsyslog-pgsql/rsyslog-pgsql.conf.template
/usr/share/doc/rsyslog-pgsql/NEWS.Debian.gz
/usr/share/doc/rsyslog-pgsql/changelog.Debian.gz