code: function getServerStatsJson () { //3/25/17by DW
  		serverStats.ctSecsSinceLastStart = utils.secondsSince (serverStats.whenLastStart); 
  		serverStats.ctSecsSinceLastFeedReed = utils.secondsSince (serverStats.whenLastFeedRead); 
  		return (utils.jsonStringify (serverStats, true)); 
  		}
docs: http server