title: How to remove/replace meta http-equiv="X-UA-Compatible" tag in Diazo
body: <p>I'm working on theming Plone site using Diazo. Unthemed site is based on Sunburst theme so this tag is inserted by main template to the /html/head:</p>
  
  <pre><code>&lt;meta http-equiv="X-UA-Compatible" content="IE=edge" /&gt;
  </code></pre>
  
  <p>My design contains </p>
  
  <pre><code>&lt;meta http-equiv="X-UA-Compatible" content="IE=EmulateIE7" /&gt;
  </code></pre>
  
  <p>so I need to replace this tag only. I want to preserve other meta tags generated by Plone.</p>
  
  <p>These rules does not work for me:</p>
  
  <pre><code>&lt;drop content="/html/head/meta[@http-equiv='IE=edge']" /&gt;
  &lt;after theme-children="/html/head"&gt;
      &lt;meta http-equiv="X-UA-Compatible" content="IE=EmulateIE7" /&gt;
  &lt;/after&gt;
  </code></pre>
  
  <p>What rules should I use?</p>