[tz] [PATCH] Revert recent pre-1970 changes.

[Lester Caine]

Paul Eggert wrote:
> Stephen Colebourne wrote:
>> >The Theory change reinstates the one zone per ISO-3166
>> >region requirement.
> I'm afraid that's incorrect.  That change would strengthen
> the requirement beyond what it ever was, by requiring a Zone
> to be present for every country.  That has never been
> required and has never been the practice in the tz database.

Since the ISO-3166-1 code table is a reasonably well used base for most 
geographical activity, at some point timezones are required to match each. As 
with pre-1970 data, this creates a new 'second database' requirement in 
providing that mapping, and personally I see no reason that it should not be 
covered by the main database. Moving on to 3166-2 and -3, the ISO have already 
solved that problem for us since that data is chargeable, so until such time as 
a freely available list is made available we are required to provide our own 
sub-zones where necessary anyway :)

-- 
Lester Caine - G8HFL
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