[tz] Proposal to deprecate "." and "-" in zone names

[Clive D.W. Feather]

Tobias Conradi said:
> "." is not used, document current usage. Reduce number of possible variations.

What about places that have a dot in their official name?

> Reduce number of possible variations.

What about places that have a hyphen in their official name?

> Avoid discussions about names as
> happened with the zone proposal for the Crozet Islands "Alfred-Faure"
> vs "Alfred Faure".

That's a discussion about which is the official name. If a zone was ever
needed for Leigh-on-Sea, then "Leigh on Sea" would be just plain
wrong, as would "Leigh" (which is a different place).

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