/usr/ is in gforge-lists-mailman 5.1.1-2.
This file is owned by root:root, with mode 0o755.
..
/usr/share/
/usr/share/gforge/
/usr/share/gforge/bin/
/usr/share/gforge/bin/create-mailing-lists.pl
/usr/share/gforge/bin/fix-mailing-lists.pl
/usr/share/gforge/etc/
/usr/share/gforge/etc/httpd.d/
/usr/share/gforge/etc/httpd.d/200list.vhost
/usr/share/gforge/etc/httpd.d/20list
/usr/share/gforge/etc/httpd.d/20zlist.vhost
/usr/share/gforge/etc/httpd.d/21list.vhost.ssl
/usr/share/doc/
/usr/share/doc/gforge-lists-mailman/
/usr/share/doc/gforge-lists-mailman/copyright
/usr/share/doc/gforge-lists-mailman/README.Debian.gz
/usr/share/doc/gforge-lists-mailman/changelog.Debian.gz