Generates a new session ID and creates a row for the new session in the database.
Gets the existing session based on the session_id available in cookies. If none is found, generates a new session.
Lazy-unmarshal session state.
Lazy-delete of session data
Has the session been loaded yet?
Recreates the cookie with the default expiration time Useful during log in for pushing back the expiration date
Regenerate the Session ID
[Validate]