title: Laravel action() helper ignores APP_URL environment variable
body: <p>In my <strong>.env</strong> file, I have the <code>APP_URL</code> set like this:</p>
  
  <pre><code>APP_URL=https://example.com
  </code></pre>
  
  <p>However, anywhere I use the <code>action()</code> helper to generate a URL, the path is created with <strong>http</strong> instead of <strong>https</strong>.</p>
  
  <p>I don't understand why this happens. The site itself runs on SSL. I also tried settings <code>BASE_URL</code> environment variable using "https" - no luck.</p>
  
  <p>Shouldn't Laravel respect my base URL?</p>
  
  <p>Laravel version: 5.2</p>
  
  <p>This happens for the <code>action()</code> helper, as well as when using HTML &amp; Forms Laravel Collective Package to generate forms (which include <code>action</code> property).</p>