title: Adding pubsubhubbub link tag to Atom feed
body: <p>According to <a href="https://pubsubhubbub.appspot.com/" rel="nofollow noreferrer">Google</a> the link tag containing the URL to the pubsubhubbub hub (This is a really terrible name) needs to go under the Atom entry element like so:</p>
  
  <pre class="lang-xml prettyprint-override"><code>&lt;?xml version="1.0" encoding="utf-8"?&gt;
  &lt;feed xml:lang="en-GB" xmlns="http://www.w3.org/2005/Atom"&gt;
    &lt;!-- ... --&gt;
    &lt;entry&gt;
      &lt;link rel="hub" href="https://pubsubhubbub.appspot.com/" /&gt;
      &lt;!-- ... --&gt;
    &lt;/entry&gt;
  &lt;/feed&gt;
  </code></pre>
  
  <p>However, all the implementations and blog posts I have seen add it to the feed element instead like so:</p>
  
  <pre class="lang-xml prettyprint-override"><code>&lt;?xml version="1.0" encoding="utf-8"?&gt;
  &lt;feed xml:lang="en-GB" xmlns="http://www.w3.org/2005/Atom"&gt;
    &lt;!-- ... --&gt;
    &lt;link rel="hub" href="https://pubsubhubbub.appspot.com/" /&gt;
    &lt;entry&gt;
      &lt;!-- ... --&gt;
    &lt;/entry&gt;
  &lt;/feed&gt;
  </code></pre>
  
  <p>What is the correct location for it?</p>