title: Where can I find a schema or documentation for the Se 2 grid hub configuration json?
body: <p>I have a Se 2 grid hub running. Where can I find documentation for the effects and schema of the -hubConfig parameter? Currently my grid hub shows: <code>"updated with grid2 config : No hub config file specified. To specify one, use -hubConfig XXX.json where XXX.json is a hub config file".</code> I can use the hub without this configured.</p>
  
  <p>I have found examples in blogs and issues, but no clear documentation. </p>
  
  <p>blogs: <a href="http://opensourcetester.co.uk/2011/07/06/selenium-grid-2/" rel="noreferrer">http://opensourcetester.co.uk/2011/07/06/selenium-grid-2/</a></p>
  
  <p>issues: <a href="http://code.google.com/p/selenium/issues/detail?id=2399" rel="noreferrer">http://code.google.com/p/selenium/issues/detail?id=2399</a></p>