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