title: Default and specific request timeout
body: <p>Usually it's desirable to have default timeout (e.g. 30s) that will be applied to all requests and can be overridden for particular <em>longer</em> requests (e.g. 600s).</p>
  
  <p>There's no good way to specify default timeout in <code>Http</code> service, to my knowledge.</p>
  
  <p>What is the way to approach this in <code>HttpClient</code> service? How to define a default timeout for all outgoing requests, that can be overriden for specific ones?</p>