Apply more bugfixes from trunk for 0.5.1

thomascube

2011-02-09 b46e5b7407940499964d8a553c3eada05850f29d

 program/include/rcube_session.php

@@ -154,6 +154,8 @@
      sprintf("DELETE FROM %s WHERE sess_id = ?", get_table_name('session')),
      $key);

    if ($key == $this->key)
        $this->vars = false;
    return true;
  }