[tz] tzdb timezone names/identifiers and links (was: Add new timezone for Hanoi Capital, Vietnam)

[Paul Eggert]

On 2/19/19 11:14 AM, Hans-Joerg Happel wrote:
>
> I'd perhaps first suggest to talk about "Identifiers of timezones" 
> instead of "Names of timezones".
>
We can emphasize the "identifier" stuff a bit more, as in the attached 
proposed patch. I'm leery of globally replacing "name" with "identifier" 
though, as "name" is shorter and makes the text easier to follow.

> A second suggestion would be a short note that it is these identifiers 
> which would be typically stored in database / system configuration / 
> appointment in order to denote the time zone of a "thing" and that 
> software will typically pick up the additional rule data in tzdb in 
> order to compute meaningful things based on these identifiers. This is 
> sort of implicit to the given text, but might be pointed out more 
> explicitly.

While this may be common practice, I'm not sure we should recommend it 
as it's fragile in the presence of timezone splits. The proposed patch 
attempts to add a warning along these lines.

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