title: Purpose of "consider_all_requests_local" in config/environments/development.rb?
body: <p>What is the purpose of this Rails config setting...</p>
  
  <pre><code>config.action_controller.consider_all_requests_local = true
  </code></pre>
  
  <p>It's set to true by default in <code>config/environments/development.rb</code>.</p>
  
  <p>Thanks,</p>
  
  <p>Ethan</p>