title: Filtering returned consul.io services on tag
body: <p>I was wondering if there is a way to filter the services consul returns me using tags.</p>
  
  <p>The endpoint:</p>
  
  <pre><code>/v1/catalog/services
  </code></pre>
  
  <p>returns a map of services to lists of tags and requires me to parse the services after they are returned.</p>
  
  <p>I was wondering if there is some way to pass the tag (or tags) I want as a query parameter to the endpoint and get a map back that is already filtered.</p>