TODO

Must of the stuff is working, but there is a list of smaller things that need to be fixed.

Speed, we can always go faster. A simple reflect server now hits 30/40K qps
go test; only work correct on my machine
Add handy zone data structure (r/b tree)? Or not...
Use the Exchange structure to deal with errors when resolving, esp. Timeout
SaltLength in NSEC3 is ugly to set, should be automatically done. There are prolly a few more settings just like that -- need to look at them. edns' NSID is another
Add tsig check in 'q'?

Examples to add