[jdk11u-dev] RFR: 8339644: Improve parsing of Day/Month in tzdata rules

Tue Oct 1 09:39:25 UTC 2024

Backport of [JDK-8339644 Improve parsing of Day/Month in tzdata rules](https://bugs.openjdk.org/browse/JDK-8339644) to prepare for [these breaking changes in the 2024b timezone update](https://lists.iana.org/hyperkitty/list/tz@iana.org/thread/LBVCBNK5NPWBNQ5UDUY3YEZPWA2QV262/)

Backport is clean but for a copyright year change in TzdbZoneRulesProvider.java (that was modified in 17 in "8241310: Fix warnings in jdk buildtools"). Passes tier1 tests.

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Commit messages:
 - Backport 5faa0df6fb1b4c5dc7f642d7e062c44a1764029c

Changes: https://git.openjdk.org/jdk11u-dev/pull/2948/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk11u-dev&pr=2948&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8339644
  Stats: 83 lines in 3 files changed: 23 ins; 26 del; 34 mod
  Patch: https://git.openjdk.org/jdk11u-dev/pull/2948.diff
  Fetch: git fetch https://git.openjdk.org/jdk11u-dev.git pull/2948/head:pull/2948

PR: https://git.openjdk.org/jdk11u-dev/pull/2948