/usr/ is in libavahi-core-dev 0.7-3.1ubuntu1.2.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/x86_64-linux-gnu/pkgconfig/
/usr/include/
/usr/include/avahi-core/
/usr/include/avahi-core/core.h
/usr/include/avahi-core/log.h
/usr/include/avahi-core/lookup.h
/usr/include/avahi-core/publish.h
/usr/include/avahi-core/rr.h
/usr/lib/
/usr/lib/x86_64-linux-gnu/
/usr/lib/x86_64-linux-gnu/libavahi-core.a
/usr/lib/x86_64-linux-gnu/pkgconfig/avahi-core.pc
/usr/share/
/usr/share/doc/
/usr/share/doc/libavahi-core-dev/
/usr/share/doc/libavahi-core-dev/copyright
/usr/lib/x86_64-linux-gnu/libavahi-core.so
/usr/share/doc/libavahi-core-dev/NEWS.gz
/usr/share/doc/libavahi-core-dev/README
/usr/share/doc/libavahi-core-dev/changelog.Debian.gz