title: htaccess rewrite suffix /lang/en to subdomain 301
body: <p>I've recently created a subdomain for my english language equivalent on my site and now want to rewrite the old urls to that subdomain.</p>
  
  <p>the old url looks like <code>http://mydomain.com/filename/lang/en</code></p>
  
  <p>I want to redirect ALL the urls that end with <code>/lang/en</code> to the subdomain e.g. <code>http://en.mydomain.com</code></p>