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.