Use INT_MAX for wal size related gucs's max value

[Junwang Zhao]

The wal size related gucs use the MB unit, so we should just use
INT_MAX instead of MAX_KILOBYTES as the max value.

-- 
Regards
Junwang Zhao

0001-use-INT_MAX-for-wal-size-related-max-value.patch
Description: Binary data