/usr/ is in fusionforge-plugin-extsubproj 5.3.2+20141104-3+deb8u3.
This file is owned by root:root, with mode 0o755.
..
/usr/share/
/usr/share/gforge/
/usr/share/gforge/plugins/
/usr/share/gforge/plugins/extsubproj/
/usr/share/gforge/plugins/extsubproj/db/
/usr/share/gforge/plugins/extsubproj/db/extsubproj-init.sql
/usr/share/gforge/plugins/extsubproj/actions/
/usr/share/gforge/plugins/extsubproj/actions/delExtSubProj.php
/usr/share/gforge/plugins/extsubproj/actions/addExtSubProj.php
/usr/share/gforge/plugins/extsubproj/view/
/usr/share/gforge/plugins/extsubproj/view/admin/
/usr/share/gforge/plugins/extsubproj/view/admin/viewGlobalConfiguration.php
/usr/share/gforge/plugins/extsubproj/view/admin/viewProjectConfiguration.php
/usr/share/gforge/plugins/extsubproj/include/
/usr/share/gforge/plugins/extsubproj/include/extsubproj_Widget_SubProjects.class.php
/usr/share/gforge/plugins/extsubproj/include/Graphite.php
/usr/share/gforge/plugins/extsubproj/include/extsubprojPlugin.class.php
/usr/share/gforge/plugins/extsubproj/www/
/usr/share/gforge/plugins/extsubproj/www/index.php
/usr/share/gforge/plugins/extsubproj/common/
/usr/share/gforge/plugins/extsubproj/common/extsubproj-init.php
/usr/share/doc/
/usr/share/doc/fusionforge-plugin-extsubproj/
/usr/share/doc/fusionforge-plugin-extsubproj/copyright
/usr/share/doc/fusionforge-plugin-extsubproj/changelog.gz
/usr/share/doc/fusionforge-plugin-extsubproj/changelog.Debian.gz