title: Facebook SDK: How to correct initialize FBSessionTokenCachingStrategy with old token?
body: <p>How to correct initialize <code>FBSessionTokenCachingStrategy</code>? </p>
  
  <p>I have: <code>facebook-ios-sdk</code> (not new, but 3.0). </p>
  
  <p>Also, i have an iOS-project, thtat must run under iOS 5.*</p>
  
  <p>And i have a trouble:</p>
  
  <p>How to correct initialize session, if it must be reopen (not open)?</p>
  
  <p>I have a <strong>token</strong> from last session and i want to login with this token. </p>
  
  <p>But for this i need to create a <code>FBSessionTokenCachingStrategy</code> instance.</p>
  
  <p>How to do this?</p>
  
  <p>Thanks for help!</p>