Fix testcase to also work on windows


BitKeeper/deleted/.del-mysql_client.test:
  Delete: mysql-test/t/mysql_client.test
BitKeeper/deleted/.del-mysql_client.result:
  Delete: mysql-test/r/mysql_client.result
mysql-test/r/mysql.result:
  Update test result
mysql-test/t/mysql.test:
  Move tests from mysql_client to mysql
  Fix test case for bug#20328 to work on windows by comparing the output from "help" and "help "