title: Why iframe is not loaded for same url as page
body: <p>I was just testing some stuff and came across the interesting <code>iframe</code> behavior.
  On the page i have the following <code>iframe</code>:</p>
  
  <pre><code>&lt;iframe src="/Wizard/Start"&gt;&lt;/iframe&gt;
  </code></pre>
  
  <p>Now, if the <code>src</code> of <code>iframe</code> is the same as url of the page <code>(.../Wizard/Start)</code>, the <code>iframe</code> does not load the contents, just remains blank and there is no errors, warnings or anything reported.</p>
  
  <p>I can see that this is by design, acts the same in all browsers.</p>
  
  <p>Why? Any official documentation on this behavior? </p>