Fixes: debug RR and header bits (#151)

Always set the auth and rd bits in the reply. And reverse the
ownername of debug queries so that manual matching is much easier.

middleware/etcd/msg/path_test.go

@@ -0,0 +1,12 @@
+package msg
+
+import "testing"
+
+func TestPath(t *testing.T) {
+	for _, path := range []string{"mydns", "skydns"} {
+		result := Path("service.staging.skydns.local.", path)
+		if result != "/"+path+"/local/skydns/staging/service" {
+			t.Errorf("Failure to get domain's path with prefix: %s", result)
+		}
+	}
+}