title: How to apply a ring-middleware to specific group of routes?
body: <p>I have a ring middleware which does some check on request maps with the header values.
  For the check I have to hit the database.</p>
  
  <p>If a defroutes as a set of routes starting with acommon URI pattern.
  I don't want a middleware to run for any random URL that matches the pattern before getting handled.</p>
  
  <p>I only want middleware to run for a certain set of URIs that I am suing inside of defroutes only. The reason being there is a database access in the middleware which I want to avoid for 404 responses having the same pattern.</p>