Added support for global/FirstLogin users_data entry

mysql> select * from users_data;
+----+--------+-------------+-------------------------------------------------+--------------+
| ID | UserID | LastUpdated | Name                                            | Value        |
+----+--------+-------------+-------------------------------------------------+--------------+
| 25 |      1 |  1301180792 | global/FirstLogin                               | 1301180792   |
+----+--------+-------------+-------------------------------------------------+--------------+
1 row in set (0.00 sec)