it's yet another mysqld hidden feature
                --exit-info=256 is like --core-file but prints info at exit.
                --exit-info itself implies also one-thread (undocumented)


mysql-test/mysql-test-run:
  --core-file changed to --exit-info=256
  it's yet another mysqld hidden feature
  --exit-info=256 is like --core-file but prints 
  info at exit.
  --exit-info itself implies also one-thread (undocumented)