clean up outdated sessions and tokens
Currently the session and token databases are ever growing. We need to remove the expired ones.
(from redmine: created on 2013-11-07, closed on 2013-11-27)
- Relations:
- child #4410 (closed)
- child #4411 (closed)
- child #4568 (closed)
- child #4571 (closed)
- child #4572 (closed)