title: How to read ruby on rails config values from within the application controller
body: <p>If i have a configuration file like this</p>
  <pre><code># config/environments/integration.rb
  config.action_controller.session = {
    :domain =&gt; &quot;.example.com&quot;
  }
  </code></pre>
  <p>How do I get the value from within my application controller, e.g:</p>
  <pre><code># app/controller/application_controller
  class ApplicationController &lt; Mcc::CoreSupport::FrontendController
    def some_method
      value = xxx
    end
  end
  </code></pre>