{{- if site.Params.ipv6ready -}}
<!-- IPv6-test.com button BEGIN -->
<a href='https://ipv6-test.com/validate.php?url=referer'
  ><img src='https://ipv6-test.com/button-ipv6-80x15.png' 
        alt='ipv6 ready' title='ipv6 ready' border='0' 
/></a>
<!-- IPv6-test.com button END -->
{{- end -}}