title: -tsa or -tsacert timestamp for applet jar self-signed
body: <p>When I was trying to self-sign in the jar like below.</p>
  
  <pre><code>jarsigner -keystore my keystore myjar.jar myalias
  </code></pre>
  
  <p>It gives warning like:</p>
  
  <blockquote>
    <p>No -tsa or -tsacert is provided and this jar is not timestamped. Without a timestamp, users may not be able to validate this jar after the signer certificate's expiration date (2014-05-08) or after any future revocation date.</p>
  </blockquote>
  
  <p>Please help to resolve the problem.</p>