Bug #16979: AUTO_INC lock in InnoDB works a table level lock
  - this is a major change in InnoDB auto-inc handling.
Bug #27950: Duplicate entry error in auto-inc after mysqld restart
  - Init AUTOINC from delete_row().
Bug #28781: InnoDB increments auto-increment value incorrectly with ON DUPLICATE KEY UPDATE
  - Use value specified by MySQL, in update_row().