extra/perror.c:
  error messages fixups
include/my_base.h:
  error codes fixups
myisam/mi_open.c:
  correct error reported
myisam/myisamchk.c:
  correct error reported
myisammrg/myrg_open.c:
  correct error reported
sql/ha_innodb.cc:
  correct error reported
sql/ha_isam.cc:
  reorder table file extensions to get better error on "cannot open the table"
sql/ha_myisam.cc:
  reorder table file extensions to get better error on "cannot open the table"
sql/ha_myisammrg.cc:
  correct error reported
sql/handler.cc:
  correct error reported