title: Varnish cache according to custom header
body: <p>I am using Varnish to serve a website but need to have the caching dependent on Geo location. I have written a small Vmod that uses Ip2Location to set a request header that has the country code in which is then passed to my application (Magento) via Apache which serves up the relevant content but I need Varnish to also cache depending on the country code.</p>
  
  <p>Is there any way to achieve this?</p>