Extension:CheckUser/cu log table

The  table records each time someone uses the CheckUser tool.

Schema summary
mysql> describe cu_log; +-+--+--+-+-++ +-+--+--+-+-++ +-+--+--+-+-++ 11 rows in set (0.00 sec) (see source here).
 * Field          | Type             | Null | Key | Default | Extra          |
 * cul_id         | int(10) unsigned | NO   | PRI | NULL    | auto_increment |
 * cul_timestamp  | binary(14)       | NO   | MUL | NULL    |                |
 * cul_user       | int(10) unsigned | NO   | MUL | NULL    |                |
 * cul_user_text  | varbinary(255)   | NO   |     | NULL    |                |
 * cul_reason     | varbinary(255)   | NO   |     | NULL    |                |
 * cul_type       | varbinary(30)    | NO   | MUL | NULL    |                |
 * cul_target_id  | int(10) unsigned | NO   |     | 0       |                |
 * cul_target_text | blob            | NO   |     | NULL    |                |
 * cul_target_hex | varbinary(255)   | NO   | MUL |         |                |
 * cul_range_start | varbinary(255)  | NO   | MUL |         |                |
 * cul_range_end  | varbinary(255)   | NO   |     |         |                |