/usr/include/x86_64-linux-gnu/zipconf.h is in libzip-dev 1.0.1-0ubuntu1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/include/x86_64-linux-gnu/../../lib/x86_64-linux-gnu/libzip/include/zipconf.h
/usr/include/x86_64-linux-gnu/../../lib/x86_64-linux-gnu/libzip/include/zipconf.h