title: WebSockets not working without WebApp
body: <p>This works:</p>
  
  <pre><code>String webappDir = "...";
  context = tomcat.addWebapp("/", new File(webappDir).getAbsolutePath());
  </code></pre>
  
  <p>This doesn't:</p>
  
  <pre><code>context = tomcat.addContext("/", new File("").getAbsolutePath());
  </code></pre>
  
  <p>I don't really need a <code>webappDir</code> in this instance because I am not serving any JSP pages or client-side resources, I'm simply using <code>response.getWriter().println(...);</code> server-side only.</p>
  
  <p>There is no exception being thrown, the websocket simply does not open. </p>
  
  <p>Can I assume that this is a tomcat bug?</p>