Test shouldTransfer by upping a testserver and sending the SOA query.
Remove state from DefaultErrorHandler and just get it from the request.
Add more logging to show what is going on.
This also adds the infrastructure for future tests.
If monitoring is enabled for one zone, also enable it for when the
server reports REFUSED. Normally the metrics are only enabled if
you enter the middleware, with this you'll see REFUSED queries.
Each of these are reported agains the root zone otherwise
Make the CH middleware actually work. Needs a bit of a hack to route
the fake version.bind and friends zone to the correct handler. Fiddle
with the order in directive.go so that CH queries get logged as well.
Secondly add class rewriting to the rewrite middleware handler and also
log the class by default.
Fix some file/secondary issues when parsing a Corefile, also allow
for multiple origins to be specified. Also don't fail on startup when
a zonetransfer fails.
Fixes: #54
