Remove obsolete BIND named.conf options
``dnssec-enable`` is obsolete in 9.16 and raises a warning. The option
defaults to ``yes`` in all supported versions of bind. The option is
removed when set to ``yes`` and a warning is emitted when the value is
``no``.
DNSSEC lookaside validation has been deprecated by RFC 8749 and the
feature removed from Bind 9.16. The only available lookaside provider
dlv.isc.org no longer provides DLV information since 2017.
Fixes: https://pagure.io/freeipa/issue/8349
Fixes: https://pagure.io/freeipa/issue/8350
Signed-off-by: Christian Heimes <cheimes@redhat.com>
Reviewed-By: Rob Crittenden <rcritten@redhat.com>
Reviewed-By: Alexander Bokovoy <abokovoy@redhat.com>