never returned by any function and was presumably cruft
        related to max-names).
  * Made allow-notify part of the public source and documented it.
  * Made master server TSIG keys part of the public source and documented it.
  * Removed a define of DNS_OPT_NEWCODES supposedly used by GNS, with
        the approval of Mike.
  * Made DNS_ZONE_FORCELOAD flag, used by rndc reload, work in the
        public source.  After the NOMINUM_PUBLIC cleanup, I'll
        fix the rndc reload issues we've been discussing here at IETF.

I left in NOMIMUM_PUBLIC around the forward-notify stuff, with the
expectation that Michael will give the go-ahead next week to remove it.