7.x-1.0
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- #1233650 - Added API function `session_api_start_session()` to give
  finer-grained control for sites running Pressflow.

6.x-1.2
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- A cookie is now set to track the session ID between log in and log
  out.

- #380510 - Comment style now conforms to Drupal coding standards.

- #380550 - Implements a better cleanup hook system.