tz package

[Bradley White]

> I suggest that you put a BIG warning around the use of 'leapseconds'
> in time calculations.  For a number of reasons, POSIX (IEEE standard
> Unix, soon to be ANSI and ISO standard unix) prohibits the standard
> conversion to/from "Seconds since the Epoch" functions from taking
> leapseconds into account.

I think we came to the conclusion before doing the leapsecond stuff that
the wording in POSIX *requires* that standard conversion routines take
leapseconds into account.

Brad