[Bug 221418] FreeBSD 10.4-PRERELEASE fails to build on systems using 32 bit time_t since r322315.

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=221418

--- Comment #3 from jau at iki.fi ---
To Conrad I have to point out that truncating INT64_MIN to 32 bits
might produce INT32_MIN on a big endian system. On a little endian
platform the type cast invariably produces a plain zero (0).

Concerning my using CHAR_BIT instead of plain numeric 8 I have to
say I like portability enough to assume someone some day might wish
to use FreeBSD on a system which does not use the 8/16/32/64 bits
basic data units division our contemporary systems use. Maybe one
day there is a reason to run FreeBSD on a system using 9/18/36 data
unit division like in the old PDP-10 or IBM 7094.

When there is no real reason to use minimum time_t it is in my
opinion really much better to use -(SYNCOOKIE_LIFETIME + 1) as
done in the fix 322454. Thanks Michael!

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