title: Rounded box-shadow on square box
body: <p>With this:</p>
  
  <pre><code>div {
      width: 200px;
      height: 100px;
      background-color: green;
      box-shadow: 0px 0px 15px #000
  }
  </code></pre>
  
  <p>I get a rectangle with drop shadow. See <a href="https://jsfiddle.net/df9dfev5/" rel="nofollow">https://jsfiddle.net/df9dfev5/</a> The problem is that the shadow has rounded corners. How can this be avoided?</p>