/usr/ is in strongswan-plugin-mysql 5.1.2-0ubuntu2.11.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/
/usr/lib/ipsec/
/usr/lib/ipsec/plugins/
/usr/lib/ipsec/plugins/libstrongswan-mysql.so
/usr/share/
/usr/share/doc/
/usr/share/doc/strongswan-plugin-mysql/
/usr/share/doc/strongswan-plugin-mysql/copyright
/usr/share/strongswan/
/usr/share/strongswan/templates/
/usr/share/strongswan/templates/database/
/usr/share/strongswan/templates/database/sql/
/usr/share/strongswan/templates/database/sql/mysql.sql
/usr/share/strongswan/templates/config/
/usr/share/strongswan/templates/config/plugins/
/usr/share/strongswan/templates/config/plugins/mysql.conf
/usr/share/doc/strongswan-plugin-mysql/NEWS.Debian.gz
/usr/share/doc/strongswan-plugin-mysql/changelog.Debian.gz