title: xmllint doesn't work with https - warning: failed to load external entity
body: <p><code>xmllint</code> does work fine with <a href="http://somesite.xml" rel="noreferrer">http://somesite.xml</a></p>
  
  <p>But it doesn't work with <a href="https://somesite.xml" rel="noreferrer">https://somesite.xml</a></p>
  
  <pre><code>xmllint https://somesite.xml
  warning: failed to load external entity "https://somesite.xml"
  </code></pre>