examples/chat: Use new listen/dial API

examples/chat/client/main.go

@@ -47,13 +47,10 @@ func main() {
 func join(address string, room string, nickname string) (hopp.Trans, error) {
 	ctx, done := context.WithTimeout(context.Background(), 16 * time.Second)
 	defer done()
-	dialer := hopp.Dialer {
-		TLSConfig: &tls.Config {
-			// don't actually do this in real life
-			InsecureSkipVerify: true,
-		},
-	}
-	conn, err := dialer.Dial(ctx, "tcp", address)
+	conn, err := hopp.Dial(ctx, "tls", address, &tls.Config {
+		// don't actually do this in real life
+		InsecureSkipVerify: true,
+	})
 	if err != nil { return nil, err }
 	
 	transRoom, err := conn.OpenTrans()