title: JSON/Jettison wrong format in string started with / (slash)
body: <p>I want this JSON:</p>
  
  <pre><code>{"lala":{"any":1,"/doc/h2":1}}
  </code></pre>
  
  <p>But using Jetisson ( <a href="http://jettison.codehaus.org/" rel="nofollow">http://jettison.codehaus.org/</a> ) like the example below:</p>
  
  <pre><code>  JSONObject extractJson = new JSONObject();
    int i = 1;
  
    extractJson.put("lala", new JSONObject()
        .put("any",1)
        .put("/doc/h" + (i+1), 1)  # HERE!
      );
  
    System.out.println(extractJson.toString());
  </code></pre>
  
  <p>return this:</p>
  
  <pre><code> {"lala":{"any":1,"\/doc\/h2":1}}
  </code></pre>
  
  <p>with an extra '\' in front of any '/'</p>
  
  <p>My question is: why? How I can generate the correct json?</p>
  
  <p>Any Idea?</p>