/usr/include/boost/network/uri/ is in libcppnetlib-dev 0.11.0-1.1.
This file is owned by root:root, with mode 0o755.
..
/usr/include/boost/network/uri/accessors.hpp
/usr/include/boost/network/uri/builder.hpp
/usr/include/boost/network/uri/config.hpp
/usr/include/boost/network/uri/decode.hpp
/usr/include/boost/network/uri/detail/
/usr/include/boost/network/uri/detail/uri_parts.hpp
/usr/include/boost/network/uri/directives/
/usr/include/boost/network/uri/directives.hpp
/usr/include/boost/network/uri/directives/authority.hpp
/usr/include/boost/network/uri/directives/fragment.hpp
/usr/include/boost/network/uri/directives/host.hpp
/usr/include/boost/network/uri/directives/path.hpp
/usr/include/boost/network/uri/directives/port.hpp
/usr/include/boost/network/uri/directives/query.hpp
/usr/include/boost/network/uri/directives/scheme.hpp
/usr/include/boost/network/uri/directives/user_info.hpp
/usr/include/boost/network/uri/encode.hpp
/usr/include/boost/network/uri/schemes.hpp
/usr/include/boost/network/uri/uri.hpp
/usr/include/boost/network/uri/uri.ipp
/usr/include/boost/network/uri/uri_io.hpp