/usr/ is in libclaw-net-dev 1.7.3-1.
This file is owned by root:root, with mode 0o755.
..
/usr/include/
/usr/include/claw/
/usr/include/claw/socket_traits_win32.hpp
/usr/include/claw/basic_socket.hpp
/usr/include/claw/socket_traits_unix.hpp
/usr/include/claw/socket_traits.hpp
/usr/include/claw/socket_server.hpp
/usr/include/claw/impl/
/usr/include/claw/impl/basic_socketbuf.tpp
/usr/include/claw/impl/socket_server.tpp
/usr/include/claw/impl/isocket_stream.tpp
/usr/include/claw/impl/osocket_stream.tpp
/usr/include/claw/impl/socket_stream.tpp
/usr/include/claw/isocket_stream.hpp
/usr/include/claw/socket_stream.hpp
/usr/include/claw/osocket_stream.hpp
/usr/include/claw/basic_socketbuf.hpp
/usr/lib/
/usr/lib/libclaw_net.a
/usr/share/
/usr/share/doc/
/usr/share/doc/libclaw-net-dev/
/usr/share/doc/libclaw-net-dev/copyright
/usr/lib/libclaw_net.so
/usr/share/doc/libclaw-net-dev/changelog.Debian.gz