www/py-dj40-django-timezone-field: Fix regression with newer pytz

* Backport a PR which fixes the "ZoneInfoNotFoundError" exception whe
  populating and comparing timezones against pytz which don't yet exist
  in zoneinfo.

MFH:		2022Q3
(cherry picked from commit 66b2b44abd)

www/py-dj40-django-timezone-field/Makefile

@@ -1,5 +1,6 @@
 PORTNAME=	django-timezone-field
 DISTVERSION=	5.0
+PORTREVISION=	1
 CATEGORIES=	www python
 MASTER_SITES=	CHEESESHOP
 PKGNAMEPREFIX=	${PYTHON_PKGNAMEPREFIX}dj40-

www/py-dj40-django-timezone-field/files/patch-timezone__field_fields.py

@@ -0,0 +1,27 @@
+From 0257f2e9c7c488e8a859ee924c93d9f38afa4dc7 Mon Sep 17 00:00:00 2001
+From: jeremystretch <jstretch@ns1.com>
+Date: Fri, 12 Aug 2022 10:03:27 -0400
+Subject: [PATCH] Fixes #94: Catch ZoneInfoNotFoundError exception when
+ populating timezones
+
+Obtained from:
+
+https://github.com/mfogel/django-timezone-field/commit/0257f2e9c7c488e8a859ee924c93d9f38afa4dc7
+
+--- timezone_field/fields.py.orig	2022-02-09 04:42:10 UTC
++++ timezone_field/fields.py
+@@ -38,7 +38,13 @@ class TimeZoneField(models.Field):
+     #       existing migration files will need to be accomodated.
+     default_max_length = 63
+     default_pytz_tzs = [pytz.timezone(tz) for tz in pytz.common_timezones]
+-    default_zoneinfo_tzs = [ZoneInfo(tz) for tz in pytz.common_timezones]
++    default_zoneinfo_tzs = []
++    for tz in pytz.common_timezones:
++        try:
++            default_zoneinfo_tzs.append(ZoneInfo(tz))
++        except ZoneInfoNotFoundError:
++            # ZoneInfo does not yet exist for this timezone
++            pass
+ 
+     def __init__(self, *args, **kwargs):
+         # allow some use of positional args up until the args we customize