title: config.vm.share_folder setting not found
body: <p>I am getting this error with this line in my Vagrantfile during vagrant up, until I comment it out.</p>
  
  <p>The setting is documented here:</p>
  
  <p><a href="http://docs-v1.vagrantup.com/v1/docs/config/vm/share_folder.html" rel="nofollow">http://docs-v1.vagrantup.com/v1/docs/config/vm/share_folder.html</a></p>
  
  <h1>Not sure why the following documented paramenter causes an error</h1>
  
  <p><code>config.vm.share_folder "puppetdir", "/etc/puppet", "/vagrant/mypuppetdir"</code></p>
  
  <pre><code>Bringing machine 'default' up with 'virtualbox' provider...
  There are errors in the configuration of this machine. Please fix
  the following errors and try again:
  
  vm:
  * The following settings don't exist: share_folder
  </code></pre>
  
  <p>The latest virtualbox and latest vagrant. everything else works fine. </p>