/usr/ is in fusionforge-plugin-authhttpd 6.0.5-2ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/
/usr/share/doc/
/usr/share/doc/fusionforge-plugin-authhttpd/
/usr/share/doc/fusionforge-plugin-authhttpd/README
/usr/share/doc/fusionforge-plugin-authhttpd/copyright
/usr/share/fusionforge/
/usr/share/fusionforge/cronjobs/
/usr/share/fusionforge/plugins/
/usr/share/fusionforge/plugins/authhttpd/
/usr/share/fusionforge/plugins/authhttpd/README
/usr/share/fusionforge/plugins/authhttpd/common/
/usr/share/fusionforge/plugins/authhttpd/common/AuthHTTPDPlugin.class.php
/usr/share/fusionforge/plugins/authhttpd/common/authhttpd-init.php
/usr/share/fusionforge/plugins/authhttpd/etc/
/usr/share/fusionforge/plugins/authhttpd/etc/authhttpd.ini
/usr/share/fusionforge/plugins/authhttpd/etc/httpd.conf.d/
/usr/share/fusionforge/plugins/authhttpd/etc/httpd.conf.d/plugin-authhttpd.inc
/usr/share/fusionforge/plugins/authhttpd/www/
/usr/share/fusionforge/plugins/authhttpd/www/post-login.php
/usr/share/fusionforge/post-install.d/
/usr/share/doc/fusionforge-plugin-authhttpd/changelog.Debian.gz