Function _cmp_variable

tests/functional/fdb_functional_test.cc:2355–2359

}

static int _cmp_variable(void *key1, size_t keylen1, void *key2, size_t keylen2)
{
    // compare only 3rd~8th bytes (ignore the others)
    return memcmp((uint8_t*)key1+2, (uint8_t*)key2+2, 6);
}

void custom_compare_variable_test()
{