title: Puppet configuration for apache2 with mod_headers
body: <p>I'm configuring a Vagrant box (Ubuntu) with a puppet manifest - Everything is working except when I visit a site on the Vagrant host I get an error:</p>
  
  <pre><code>Invalid command 'Header'
  </code></pre>
  
  <p>Which I believe is due to Apache's mod_header not being loaded. The puppet manifest for apache2 is simple:</p>
  
  <pre><code>class { 'apache2':
      document_root =&gt; '/path/to/docroot',
  }
  </code></pre>
  
  <p>How do I tell puppet to provision the Vagrant box to enable mod_headers?</p>