Zonemgr not reacting to notifies

[Spain, Dr. Jeffry A.]

> It seems to be a bug, but I couldn't easily identify anything obviously wrong.  zonemgr is already so broken and we'll need to re-design/re-implement it pretty fundamentally anyway.  I'm not sure if we can easily fix it.  At least we can try to build our own test cases to see whether we can reproduce it ourselves.

> One quick question: does it always fail, or does it sometimes succeed?

I don't have a good feel for this right now. I will test with some additional zone changes and get back to you. Thanks. Jeff.