The problem was overflow in max_length when we tried to des_decrypt()
something which is not the output of des_encrypt()


mysql-test/r/ssl_and_innodb.result:
  New test case.
mysql-test/t/ssl_and_innodb.test:
  New test case.
sql/item_strfunc.h:
  Do not subtract the encrypt overhead (9U) if args[0] has length < 9
  (In unsigned arithmetic, (1-9) becomes a very large number)