<https://cgit.freebsd.org/ports/commit/?id=dceb46fc8a6eea281dbafc46e6452a9d82550b09>
<https://cgit.freebsd.org/ports/commit/?id=fa129ae393bdd8a9d388a7b8acf6150a4d75781>
FYI, and duly note that libxslt is unmaintained upstream so we can't
rely on fixes appearing at all or in an orderly manner.
