Parsing cookie that overflow `long` return wrong value

[Tesseract22]

When a fiobj is of type FIOBJ_T_NUMBER, and it contains a number that overflows long (i64) such as 13725369883134782382, fiobj_obj2num returns the maximum of i64 which is 9223372036854775807.

This occurs to me while using zap, where I am using a unsigned long u64 number in a cookie. I was scratching my head thinking why do session cookie validation only works 50% of the time, turns out it is a classic integer overflow bug. When I switched to i64 for the cookie the bug immediately disappeared.

[boazsegev]

Hi @Tesseract22 ,

Thank you for opening this issue.

However, I need a little more context to understand where the number is used and where the conversion into FIOBJ happens.

Thanks.