title: Is an html link relative only if the value begins with http?
body: <p>For example the html</p>
  
  <pre><code>&lt;a href="www.yahoo.com"&gt;free e-mail and news&lt;/a&gt;
  </code></pre>
  
  <p>Is treated relative but </p>
  
  <pre><code>&lt;a href="http://www.yahoo.com"&gt;free e-mail and news&lt;/a&gt;
  </code></pre>
  
  <p>links to <a href="http://www.yahoo.com" rel="nofollow">yahoo.com</a>. Is that all there is to it, the only way a link is absolute is if it starts with http or https?</p>