"changed" field should be deleted

  > Michael van Elst <mlelstv at xlink.net> writes:
  > 
  > Hiding the changed: lines definitely breaks every system that keeps
  > _copies_ of the entries because it is impossible to update entries
  > from these copies without trashing the existing entries.

I do not understand that one. It is quite possible to send an object
more than once the the update process. This will result in a
NOOP update as documented in http://www.ripe.net/docs/ripe-157.html#toc27.
It does not clobber anything. What am I missing?

  > And if you make the changed: line availables optionally then those
  > who want to use addresses will quickly figure out how to get them.

Gabor's argument was about users with no clue (or scripts) finding addresses
in output returned by whois. This would be prevented. 
Also we can add the usage of this flag to our heuristics which detect
patterns in whois queries.

Daniel