FLAVOR: Ubuntu Server
HEADLINE: bind package with support for DNS cookies
DESCRIPTION: https://kb.isc.org/article/AA-01387/0/DNS-Cookies-in-BIND-9.... describes DNS cookies; last I checked, it seemed that Ubuntu wasn't in any hurry to upgrade to a version of bind that turns DNS cookies on by default, and also probably wasn't passing the build time option to turn on DNS cookies on the version that was being shipped.