title: React ignores 'for' attribute of the label element
body: <p>In React (Facebook's framework), I need to render a label element bound to a text input using the standard <code>for</code> attribute.</p>
  
  <p>e.g. the following JSX is used:</p>
  
  <pre><code>&lt;label for="test"&gt;Test&lt;/label&gt;
  &lt;input type="text" id="test" /&gt;
  </code></pre>
  
  <p>However, this produces HTML missing the required (and standard) <code>for</code> attribute:</p>
  
  <pre><code>&lt;label&gt;Test&lt;/label&gt;
  &lt;input type="text" id="test"&gt;
  </code></pre>
  
  <p>What am I doing wrong?</p>