[tz] Inconsistencies between backward and backzone

[Paul Eggert]

On 5/2/23 07:48, Benjamin Drung via tz wrote:
> First investigation indicate that the timezones in backzone did not get
> the recent updates applied to them.

The Makefile says to use PACKRATDATA=backzone only if "out-of-scope and 
often-wrong data" are wanted, so those issues are as advertised. Please 
feel free to suggest specific fixes to backzone, using "git 
format-patch" to format the patches so that they can be applied easily. 
Another possibility is to not use PACKRATDATA=backzone, as it is not 
well maintained and surely has other problems.