[jdk17u] RFR: 8305113: (tz) Update Timezone Data to 2023c

[Andrew John Hughes]

On Mon, 10 Apr 2023 21:53:32 GMT, Rui Li <duke at openjdk.org> wrote:

> Backport tz2023c.
> 
> The backport is NOT clean:
> 
> - I had to drop [src/java.base/share/classes/sun/util/calendar/ZoneInfoFile.java](https://github.com/openjdk/jdk/commit/ed9592c6e81f82e2bf6508ce45ba15aad8232181#diff-88f8bdbe16f63d17eca77e3af484f7491244be70448029a19548032640dc3475) in the original patch, since 17 already has that block of code (same code. It just writes out enums as numbers): [link](https://github.com/openjdk/jdk17u/blob/master/src/java.base/share/classes/sun/util/calendar/ZoneInfoFile.java#L633-L636). The code was deleted in 18 for https://bugs.openjdk.org/browse/JDK-8274864 and now added back as part of tz 2023c.
> 
> - Also resolved minor conflicts for test/jdk/java/util/TimeZone/TimeZoneTest.java: copyright year and `@bug` JBS tags.
> 
> Testing: jtreg tier1 passed.

JDK-8274864 should be backported first for 11u & 17u, as is the case in Oracle's forks; see https://github.com/openjdk/jdk17u-dev/pull/1240

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PR Comment: https://git.openjdk.org/jdk17u/pull/368#issuecomment-1505760376