Add AXFR test

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.

middleware/file/notify.go

@@ -42,7 +42,6 @@ func notify(zone string, to []string) error {
 	c := new(dns.Client)
 
 	for _, t := range to {
-		// TODO(miek): these ACLs thingies not to be formalized.
 		if t == "*" {
 			continue
 		}