$ curl --head wordpress.com
  HTTP/1.1 200 OK
  Server: nginx
  Date: Tue, 08 Dec 2009 00:08:45 GMT
  Content-Type: text/html; charset=UTF-8
  Connection: close
  Last-Modified: Tue, 08 Dec 2009 00:08:25 +0000
  Cache-Control: max-age=10, must-revalidate
  Vary: Cookie
  X-hacker: If you're reading this, you should visit automattic.com/jobs 
            and apply to join the fun, mention this header.
  X-Pingback: http://wordpress.com/xmlrpc.php
  Link: <http://wp.me/1>; rel=shortlink
  X-nananana: Batcache