When using HAProxy for virtual hosting, I can see how to use the Host from the header at the front end to decide what backend to route to. However, is it possible to make the back end be a URL which includes a path (not unlike what you would do with apache or nginx when setting up virtual hosting). 

<http://www.techrawr.com/tag/haproxy/> - shows most of it. But what if the back ends were on the one server but with backend1 and backend2 as the servers?