Re: Update timezone to C99

Peter Eisentraut <peter@eisentraut.org> writes:
> To fix that, I re-downloaded the upstream code (same version as before), 
> applied the fixes described in src/timezone/README, except those related 
> to the integer types, and then put back the PostgreSQL-specific code and 
> massaged things to remove irrelevant differences.  There were a few 
> other minor and cosmetic changes that I left in to improve alignment 
> with upstream.

Hm, I've had "re-sync TZ code with upstream" on my TODO list for
several years now.  I believe there's been quite a bit of churn
upstream since tzcode2020d, some of it oriented towards this same
issue of code modernization.  Maybe we should try to sync with
a newer release while we're at it.

            regards, tom lane