RFR: Merge jdk8u:master

[Andrew John Hughes]

Merge jdk8u422-b01

GHA builds will not work until [JDK-8293107](https://bugs.openjdk.org/browse/JDK-8293107) is merged in 8u462-b01

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Commit messages:
 - Merge jdk8u422-b01
 - 8258855: Two tests sun/security/krb5/auto/ReplayCacheTestProc.java and ReplayCacheTestProcWithMD5.java failed on OL8.3
 - 8159454: [TEST_BUG] javax/swing/ToolTipManager/7123767/bug7123767.java: number of checked graphics configurations should be limited
 - 8318410: jdk/java/lang/instrument/BootClassPath/BootClassPathTest.sh fails on Japanese Windows
 - Merge
 - 8324185: [8u] Accept Xcode 12+ builds on macOS
 - 8329544: [8u] sun/security/krb5/auto/ReplayCacheTestProc.java cannot find the testlibrary
 - 8069389: CompilerOracle prefix wildcarding is broken for long strings
 - 8320005: Allow loading of shared objects with .a extension on AIX
 - 8291638: Keep-Alive timeout of 0 should close connection immediately
 - ... and 19 more: https://git.openjdk.org/shenandoah-jdk8u/compare/e9673f06...c4a38714

The webrevs contain the adjustments done while merging with regards to each parent branch:
 - master: https://webrevs.openjdk.org/?repo=shenandoah-jdk8u&pr=74&range=00.0
 - jdk8u:master: https://webrevs.openjdk.org/?repo=shenandoah-jdk8u&pr=74&range=00.1

Changes: https://git.openjdk.org/shenandoah-jdk8u/pull/74/files
  Stats: 3886 lines in 455 files changed: 2869 ins; 99 del; 918 mod
  Patch: https://git.openjdk.org/shenandoah-jdk8u/pull/74.diff
  Fetch: git fetch https://git.openjdk.org/shenandoah-jdk8u.git pull/74/head:pull/74

PR: https://git.openjdk.org/shenandoah-jdk8u/pull/74