Don't allow passing unsupported client flags to mysql_real_connect ()

#define CLIENT_DEPRECATE_EOF (1ULL << 24)

unsigned long client_flags = CLIENT_REMEMBER_OPTIONS | CLIENT_DEPRECATE_EOF;

if (mysql_real_connect(mysql, host, user, password, db, 0, NULL, client_flags))

{

  printf("error: %s\n", mysql_error(mysql));

}