add bogus nl zone

ex/fks/main.go

@@ -16,18 +16,21 @@ var (
 func main() {
 	flag.Parse()
 	if *z == "" {
-		log.Fatal("no zone")
+		log.Fatal("fks: no zone")
 	}
 	if *o == "" {
-		log.Fatal("no origin")
+		log.Fatal("fks: origin")
 	}
 	Z := make(map[string]*dns.Zone)
 	if e := addZone(Z, *o, *z); e != nil {
-		log.Fatal("Huh %s\n", e.Error())
+		log.Fatal("fks: %s\n", e.Error())
 	}
+	if e := addZone(Z, "nl.", "z/nl.db"); e != nil {
+		log.Fatal("fks: %s\n", e.Error())
+	}
+
 	dns.HandleFunc(*o, func(w dns.ResponseWriter, req *dns.Msg) { serve(w, req, Z[dns.Fqdn(*o)]) })
 	dns.HandleFunc("nl.", func(w dns.ResponseWriter, req *dns.Msg) { serve(w, req, Z["nl."]) })
-	dns.HandleFunc(".", func(w dns.ResponseWriter, req *dns.Msg) { serve(w, req, Z["."]) })
 
 	go func() {
 		err := dns.ListenAndServe(":8053", "udp", nil)

ex/fks/serve.go

@@ -6,6 +6,9 @@ import (
 )
 
 func serve(w dns.ResponseWriter, req *dns.Msg, z *dns.Zone) {
+	if z == nil {
+		panic("fks: no zone")
+	}
 	if *l {
 		log.Printf("fks: [zone %s] incoming %s %s %d\n", z.Origin, req.Question[0].Name, dns.Rr_str[req.Question[0].Qtype], req.MsgHdr.Id)
 	}

server.go

@@ -110,10 +110,9 @@ func (mux *ServeMux) match(zone string, t uint16) Handler {
 				return d.Value.(Handler)
 			}
 		}
-
 		return h.Value.(Handler)
 	}
-	// Best matching
+	// Best matching one.
 	if h := mux.m.Predecessor(zone); h != nil && h.Value != nil {
 		return h.Value.(Handler)
 	}