/usr/ is in mapserver-doc 7.0.0-9ubuntu3.
This file is owned by root:root, with mode 0o755.
..
/usr/share/
/usr/share/doc/
/usr/share/doc/mapserver-doc/
/usr/share/doc/mapserver-doc/xmlmapfile/
/usr/share/doc/mapserver-doc/xmlmapfile/tests/
/usr/share/doc/mapserver-doc/xmlmapfile/tests/mapfile-test.xml
/usr/share/doc/mapserver-doc/xmlmapfile/tests/layerset.xml
/usr/share/doc/mapserver-doc/xmlmapfile/tests/symbolset.xml
/usr/share/doc/mapserver-doc/xmlmapfile/mapfile.xsd
/usr/share/doc/mapserver-doc/xmlmapfile/mapfile.xsl
/usr/share/doc/mapserver-doc/copyright
/usr/share/doc/mapserver-doc/fonts/
/usr/share/doc/mapserver-doc/fonts/README
/usr/share/doc/mapserver-doc/fonts/fonts.list.example
/usr/share/doc/mapserver-doc/changelog.Debian.gz
/usr/share/doc/mapserver-doc/README
/usr/share/doc/mapserver-doc/COMMITERS
/usr/share/doc/mapserver-doc/MIGRATION_GUIDE.txt
/usr/share/doc/mapserver-doc/symbols/
/usr/share/doc/mapserver-doc/symbols/examples.map
/usr/share/doc/mapserver-doc/symbols/examples.sym