[tz] Anticipated strategy for handling US state DST rule changes

[Paul Eggert]

On 12/11/19 3:30 PM, Marc Sackeli wrote:
>  From the looks of it, state names are only used when the state itself 
> doesn't adhere to a single timezone.

Yes, but that's for directory names, e.g., America/Indiana/Petersburg; 
there is no America/Indiana zone. This is more to handle 
ambiguity/obscurity.

We will be in trouble if the state of New York splits, since 
America/New_York cannot be a directory name.