NEWS: IPv6 fix-up

NEWS

@@ -20,7 +20,7 @@ Important notes:
    All values are expressed in milliseconds as in previous versions.
  * HTTP server IP address, port, and TLS configuration is now centralized:
    - The --http-host option sets the address, e.g. "--http-host=[2001:db8::1]".
-     By default, both [::] and 0.0.0.0 are used.
+     By default, both :: and 0.0.0.0 are used.
    - The --http-port and --https-port options set the port numbers.
      By default, 8080 is used for HTTP, and 8443 for HTTPS.
    - The TLS credentials are configured with --http-cert (public certificate),