[tz] Etc/GMT+nn and Etc/GMT-nn not working since zic 2021d

[Paul Eggert]

On 3/22/22 09:39, Ian Abbott wrote:
> 
> Perhaps the low/high cutoff points could be rounded down/up to actual 
> transition points (if they exist) or beginning/end of representable 
> time?  That might put more leap second transitions in the zone though.

Yes, and the idea of zic -r is to represent the cutoff points as 
specified, using the RFC 8536 format, so adjusting them is probably not 
a good idea.