RFR: Merge lworld

[David Simms]

Merge tag jdk-16+22

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Commit messages:
 - Merge branch 'lworld' into type-restrictions_merge_jdk_16_22
 - Merge jdk
 - 8255555: Bad copyright headers in SocketChannelCompare.java SocketChannelConnectionSetup.java UnixSocketChannelReadWrite.java
 - 8253939: [TESTBUG] Increase coverage of the cgroups detection code
 - 8255554: Bad copyright header in AbstractFileSystemProvider.java
 - 8255457: Shenandoah: cleanup ShenandoahMarkTask
 - 8255441: Cleanup ciEnv/jvmciEnv::lookup_method-s
 - 8255014: Record Classes javax.lang.model changes, follow-up
 - 8245194: Unix domain socket channel implementation
 - 8255013: implement Record Classes as a standard feature in Java, follow-up
 - ... and 31 more: https://git.openjdk.java.net/valhalla/compare/4c989999...b740b38d

The webrevs contain the adjustments done while merging with regards to each parent branch:
 - type-restrictions: https://webrevs.openjdk.java.net/?repo=valhalla&pr=249&range=00.0
 - lworld: https://webrevs.openjdk.java.net/?repo=valhalla&pr=249&range=00.1

Changes: https://git.openjdk.java.net/valhalla/pull/249/files
  Stats: 10175 lines in 319 files changed: 6638 ins; 2421 del; 1116 mod
  Patch: https://git.openjdk.java.net/valhalla/pull/249.diff
  Fetch: git fetch https://git.openjdk.java.net/valhalla pull/249/head:pull/249

PR: https://git.openjdk.java.net/valhalla/pull/249