Update to tzdata-2024b

- System V names are now obsolescent.
- The main data format now uses %z.
- The code now conforms to RFC 8536 for early timestamps.
- Support POSIX.1-2024, which removes asctime_r and ctime_r.
- Assume POSIX.2-1992 or later for shell scripts.
- SUPPORT_C89 now defaults to 1.
- Include two upstream patches for month names as in April vs Apr.

Harden against links to removed zones.

Resolves: #2310315
Reviewed-by: Carlos O'Donell <carlos@redhat.com>

ZoneTest.java

@@ -0,0 +1,42 @@
+/* Smoke test to ensure that tzdb.data can be loaded.
+   Copyright (c) 2024 Red Hat, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Affero General Public License as
+   published by the Free Software Foundation, either version 3 of the
+   License, or (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Affero General Public License for more details.
+
+   You should have received a copy of the GNU Affero General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
+
+
+import java.time.zone.ZoneRulesProvider;
+import java.util.Calendar;
+import java.util.GregorianCalendar;
+import java.util.Locale;
+import java.util.Set;
+import java.util.TimeZone;
+
+public class ZoneTest {
+    public static void main(String[] args) {
+        // This is what failed in OpenJDK's build.tools.cldrconverter.
+        new GregorianCalendar(TimeZone.getTimeZone("America/Los_Angeles"),
+            Locale.US).get(Calendar.YEAR);
+
+        // In some OpenJDK versions, this exercises a different parser.
+        Set<String> available = ZoneRulesProvider.getAvailableZoneIds();
+        boolean errors = false;
+        if (available.contains("ROC"))
+            System.out.println("error: ROC zone is present");
+        if (!available.contains("America/New_York"))
+            System.out.println("error: America/New_York is missing");
+        if (errors)
+            System.exit(1);
+    }
+}
+