[Bug 276281] lang/python39 fails to include tzset in time module

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=276281

--- Comment #5 from Ken McDonell <kenj@kenj.id.au> ---
I'm no bugzilla wizard, nor a FreeBSD bug workflow expert, so please do what
you need to ... the root cause appears to be in libc's localtime().

But please note the Python problem is a build-time issue, not a run time issue,
so once localtime() is fixed, Python will need to be re-built and re-released.

The issue has nothing to do with the system's timezone, the reproducer snippet
I included originally explicitly sets TZ in the environment, calls tzset() and
localtime() returns the wrong result.

I've attached a small C program that reproduces the problem, and here is my
output:

kenj@vm06:~$ cc groundhog.c 
kenj@vm06:~$ a.out
OK
I am: FreeBSD 13.2-RELEASE-p4 GENERIC 13.2-RELEASE-p4

kenj@vm10:~$ cc groundhog.c 
kenj@vm10:~$ a.out
Botch hour=10 not 11
Botch isdst=0 not 1
I am: FreeBSD 14.0-RELEASE-p3 #0: Mon Dec 11 04:54:25 UTC 2023    
root@amd64-builder.daemonology.net:/usr/obj/usr/src/i386.i386/sys/GENERIC
14.0-RELEASE-p3

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