[dns-operations] default out-of-box configuration

[Paul Vixie]

# > and yet, the time has come when the default out-of-box configuration for
# > smtp relays is to non-open.
# 
# Will it be that way for BIND as well?

i'm recommending it to the staff now.  if we reach consensus on that, we'll
recommend it to the bind forum.  if possible, the answer will be "yes", and
perhaps as soon as 9.4.0 (though this would be a very late change and the
code has been feature-frozen for a while now.)