/usr/share/man/man3/query_user_context.3.gz is in libselinux1-dev 2.6-3+b3.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/man/man3/get_ordered_context_list.3.gz
/usr/share/man/man3/get_ordered_context_list.3.gz