title: restify auditLogger plugin
body: <p>I am using restify auditLogger plugin with bunyun logger. </p>
  
  <pre><code>server.on('after', restify.plugins.auditLogger({
      log: bunyan.createLogger({
        name: 'audit',
        stream: process.stdout
      }),
      event: 'after',
      printLog: true
    }));
  </code></pre>
  
  <p>but when I use an api for getting and posting things .. this code doesn't log anything in console of node. 
  am I doing this right? or how to use bunyun logger with restify auditLogger ? 
  Thanks in advance. </p>