title: Beanstalkd / Pheanstalk security issue
body: <p>I have just started using <strong>beanstalkd</strong> and <strong>pheanstalk</strong> and I am curious whether the following situation is a security issue (and if not, why not?):</p>
  
  <p>When designing a queue that will contain jobs for an eventual worker script to pick up and preform SQL database queries, I asked a friend what I could do to prevent an online user from going into port 11300 of my server, and inserting a job into the queue himself and hence causing the job to be executed with malicious code. I was told that I could include a password inside the job being sent.</p>
  
  <p>Though after some time passed, I recognized that someone could preform a few simple commands on a terminal and obtain the job inside the queue, and hence find the password, and then create jobs with the password included:</p>
  
  <pre><code>telnet thewebsitesipaddress 11300 //creating a telnet connection
  list-tubes //finding which tubes are currently being used
  use a_tube_found //using one of the tubes found
  peek-ready //see whats inside one of the jobs and find the password
  </code></pre>
  
  <p>What could be done to make sure this does not happen and my queue doesn't get hacked / controlled?</p>
  
  <p>Thanks in advance!</p>