Merge Revision revid:mmakela@bk-internal.mysql.com-20100429132743-8rjjgoqbvddr2i5x from MySQL InnoDB
Fix handler parts for drizzle handler.
Original revid:mmakela@bk-internal.mysql.com-20100429132743-8rjjgoqbvddr2i5x
Original Authors: Marko Makela <mmakela@bk-internal.mysql.com>
Original commit message:
Reduce the next-key locking of READ UNCOMMITTED to match that of
READ COMMITTED in the InnoDB Plugin. (Bug #48607)