CHECK/REPAIR syntax cleanup
REPAIR ... USE_FRM syntax


include/myisam.h:
  mi_check flags cleanup
myisam/mi_check.c:
  mi_check flags cleanup
myisam/myisamchk.c:
  mi_check flags cleanup
mysql-test/r/check.result:
  CHECK/REPAIR syntax cleanup
mysql-test/r/show_check.result:
  CHECK/REPAIR syntax cleanup
mysql-test/t/check.test:
  CHECK/REPAIR syntax cleanup
mysql-test/t/show_check.test:
  CHECK/REPAIR syntax cleanup
sql/ha_myisam.cc:
  mi_check flags cleanup
sql/handler.h:
  mi_check flags cleanup
sql/lex.h:
  REPAIR ... USE_FRM syntax
sql/slave.cc:
  mi_check flags cleanup