title: Foreman start multiple processes?
body: <p>I have three processes defined in my <code>Procfile</code>. Sometimes, I only want to run two of them. Is there a command for that?</p>
  
  <pre><code>$ foreman start process_1 process_2
  ERROR: "foreman start" was called with arguments ["process_1", "process_2"]
  Usage: "foreman start [PROCESS]"
  </code></pre>