RFR: 8340552: Harden TzdbZoneRulesCompiler against missing zone names [v2]

[Andrew John Hughes]

On Mon, 23 Sep 2024 15:28:48 GMT, Florian Weimer <fweimer at openjdk.org> wrote:

>> 8340552: Harden TzdbZoneRulesCompiler against missing zone names
>
> Florian Weimer has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Update copyright year

Copyright year change looks good.

-------------

Marked as reviewed by andrew (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/21112#pullrequestreview-2328202443