perl-XML-Twig: The option to `expand_external_ents`, documented as controlling external entity expansion in XML::Twig does not work. External entities are always expanded, regardless of the option's setting.
http://www.securityfocus.com/bid/94219
http://www.openwall.com/lists/oss-security/2016/11/04/2
http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00033.html
http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00020.html