Fix duplicate key in test data

config_test.go

@@ -42,7 +42,7 @@ func (s *ConfigSuite) TestReadConfigs(c *C) {
 		Target, Equals, "bar.test.example.com.")
 
 	c.Check(tz.Labels["www-alias"].
-		firstRR(dns.TypeCNAME).(*dns.CNAME).
-		Target, Equals, "bar-alias.test.example.com.")
+		firstRR(dns.TypeMF).(*dns.MF).
+		Mf, Equals, "www")
 
 }

dns/test.example.com.json

@@ -41,9 +41,6 @@
     "www-cname": {
       "cname": "bar"
     },
-    "www-alias": {
-      "cname": "bar-alias"
-    },
     "cname-long-ttl": {
       "cname": "geo.bitnames.com.",
       "ttl": 86400

serve_test.go

@@ -48,7 +48,7 @@ func (s *ConfigSuite) TestServing(c *C) {
 
 	// TODO: make the alias and cname respond with the data for the target, too?
 	r = exchange(c, "www-alias.test.example.com.", dns.TypeA)
-	c.Check(r.Answer[0].(*dns.CNAME).Target, Equals, "bar-alias.test.example.com.")
+	c.Check(r.Answer[0].(*dns.CNAME).Target, Equals, "geo.bitnames.com.")
 
 	/* MX */
 	r = exchange(c, "test.example.com.", dns.TypeMX)