title: Kill user session
body: <p>I have 3 tabs. Home, tab1, tab2. When user launches the app, its directed to Home tab &amp; I create a new session using <code>HttpSession session = request.getSession();</code>
  When user browses to other tabs, I maintain the session using <code>HttpSession session = request.getSession(false);</code>
  Now if the user click back on Home tab, I want to destroy the previous session and start fresh with new session. Please tell me how to do it?</p>