SECURITY UPDATE: Multiple assertion failures in named when handling DNS
messages with non-IN class (CHAOS, HESIOD) or meta-classes (ANY, NONE)
in UPDATE, NOTIFY, and recursion paths
debian/patches/CVE-2026-5946.patch: disable recursion for non-IN views,
reject UPDATE and NOTIFY for non-IN classes, validate DNS message CLASS
early in request processing, reject NONE/ANY meta-classes in UPDATE and
NOTIFY questions, and skip deny-answer-address for non-IN addresses in
bin/named/server.c, lib/bind9/check.c, lib/dns/adb.c,
lib/dns/message.c, lib/dns/resolver.c, lib/ns/client.c, lib/ns/update.c