docs: function init(opts) {
  	if (!opts) opts = {}
  	if (opts.infoLog != null) infoLog = opts.infoLog
  	if (typeof opts.opsShutdown === 'function') opsShutdown = opts.opsShutdown
  	if (typeof opts.log === 'function') log = opts.log
  	if (opts.appName) appName = opts.appName + ':' + process.pid
  	var signals = opts.signals || {}
  	for (var signal in knownSignals) { // add knownSignals default listeners
  		if (signals[signal] !== false) ensureListener(signal, knownSignals[signal])
  	}
  	for (var signal in signals) { // add additional ignoring listeners
  		if (!knownSignals[signal] || signals[signal] === true) ensureListener(signal, ignoringHandler(signal))
  	}
  	if (opts.appInfo) appInfo = opts.appInfo
  	if (opts.tmpFolder) tmpFolder = opts.tmpFolder
  }