RFR: 8254177: (tz) Upgrade time-zone data to tzdata2020b

[Andrew John Hughes]

On Tue, 13 Oct 2020 11:32:54 GMT, Kiran Sidhartha Ravikumar <kravikumar at openjdk.org> wrote:

>> Looks good. I think we should release-note the removal of the "US/Pacific-New" Link on the off chance that some
>> production/testing system is looking for such a zone.
>
> Thanks for the review everyone, I have added a release note to the bug. I will integrate the changes

Looks like we both reached the same patch for this one independently :)
systemv was removed from tzdata some time ago and wasn't even being read by the JDK as far as I could see. Its contents
are duplicated in jdk11_backward anyway. Good to see both it and pacificnew being removed. In the unlikely event the
removal of Pacific_New is problematic, it could be added to jdk11_backward as well, but it seems very unlikely.

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PR: https://git.openjdk.java.net/jdk/pull/602