8268678: LetsEncryptCA.java test fails as Let’s Encrypt Authority X3 is retired

[RealCLanger]

---

Progress

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Issue

• JDK-8268678: LetsEncryptCA.java test fails as Let’s Encrypt Authority X3 is retired

Reviewing

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Checkout this PR locally:
$ git fetch https://git.openjdk.java.net/jdk11u-dev pull/56/head:pull/56
$ git checkout pull/56

Update a local copy of the PR:
$ git checkout pull/56
$ git pull https://git.openjdk.java.net/jdk11u-dev pull/56/head

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$ git pr checkout 56

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Download this PR as a diff file:
https://git.openjdk.java.net/jdk11u-dev/pull/56.diff

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[openjdk]

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

[openjdk]

@RealCLanger This change now passes all automated pre-integration checks.

After integration, the commit message for the final commit will be:

8268678: LetsEncryptCA.java test fails as Let’s Encrypt Authority X3 is retired

You can use pull request commands such as /summary, /contributor and /issue to adjust it as needed.

At the time when this comment was updated there had been 5 new commits pushed to the master branch:

• 3c54e03: 8251945: SIGSEGV in PackageEntry::purge_qualified_exports()
• cbe9c1b: 8213137: Remove static initialization of monitor/mutex instances
• e44258c: 8266248: Compilation failure in PLATFORM_API_MacOSX_MidiUtils.c with Xcode 12.5
• 9420012: 8024368: private methods are allocated vtable indices
• cfdfee7: 8241353: NPE in ToolProvider.getSystemJavaCompiler

Please see this link for an up-to-date comparison between the source branch of this pull request and the master branch.
As there are no conflicts, your changes will automatically be rebased on top of these commits when integrating. If you prefer to avoid this automatic rebasing, please check the documentation for the /integrate command for further details.

➡️ To integrate this PR with the above commit message to the master branch, type /integrate in a new comment.

[mlbridge]

Webrevs

• 00: Full (db1fc670)

[RealCLanger]

Pushed to jdk11u and will be merged via next jdk11u->jdk11u-dev integration.