8339803: Acknowledge case insensitive unambiguous keywords in tzdata files

[dimitryc]

trafficstars

Improves parsing of keywords in tzdata rules

• The patch from 11u doesn't apply cleanly due to JDK-8042369 missing in 8u. I backported new version of parseYear method (https://hg.openjdk.org/jdk9/jdk9/jdk/rev/6c26f18d9bc0#l8.347) with minor adaption to 8u codebase and then replaced uses of equals() with regionMatches()
• Minor conflict in copyright year in RuleRec.java, applied manually

Testing: all relevant tests passed (java/text/Format java/util/TimeZone sun/util/calendar sun/util/resources)

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Progress

• [ ] Change must be properly reviewed (1 review required, with at least 1 Reviewer)
• [x] Change must not contain extraneous whitespace
• [x] Commit message must refer to an issue
• [ ] JDK-8339803 needs maintainer approval

Issue

• JDK-8339803: Acknowledge case insensitive unambiguous keywords in tzdata files (Bug - P4)

Reviewing

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Checkout this PR locally:
$ git fetch https://git.openjdk.org/jdk8u-dev.git pull/632/head:pull/632
$ git checkout pull/632

Update a local copy of the PR:
$ git checkout pull/632
$ git pull https://git.openjdk.org/jdk8u-dev.git pull/632/head

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$ git pr checkout 632

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https://git.openjdk.org/jdk8u-dev/pull/632.diff

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Link to Webrev Comment

[bridgekeeper[bot]]

:wave: Welcome back dcherepanov! A progress list of the required criteria for merging this PR into master will be added to the body of your pull request. There are additional pull request commands available for use with this pull request.

[openjdk[bot]]

❗ This change is not yet ready to be integrated. See the Progress checklist in the description for automated requirements.

[openjdk[bot]]

This backport pull request has now been updated with issue from the original commit.

[mlbridge[bot]]

Webrevs

• 00: Full (f1a10292)

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[bridgekeeper[bot]]

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