RFR: Merge jdk16

[Jesper Wilhelmsson]

Forwardport JDK 16 -> JDK 17

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Commit messages:
 - Merge
 - 8258832: ProblemList com/sun/jdi/AfterThreadDeathTest.java on Linux-X64
 - 8258827: ProblemList Naming/DefaultRegistryPort.java and Naming/legalRegistryNames/LegalRegistryNames.java on Windows
 - 8258802: ProblemList TestJstatdDefaults.java, TestJstatdRmiPort.java, and TestJstatdServer.java
 - 8258790: C2: Crash on empty macro node list
 - 8258443: doclint should be service-loaded with system class loader
 - 8255763: C2: OSR miscompilation caused by invalid memory instruction placement
 - 8258714: Shenandoah: Process references before evacuation during degen

The webrevs contain the adjustments done while merging with regards to each parent branch:
 - master: https://webrevs.openjdk.java.net/?repo=jdk&pr=1870&range=00.0
 - jdk16: https://webrevs.openjdk.java.net/?repo=jdk&pr=1870&range=00.1

Changes: https://git.openjdk.java.net/jdk/pull/1870/files
  Stats: 203 lines in 12 files changed: 181 ins; 13 del; 9 mod
  Patch: https://git.openjdk.java.net/jdk/pull/1870.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/1870/head:pull/1870

PR: https://git.openjdk.java.net/jdk/pull/1870