RFR: JDK-8284858: Start of release updates for JDK 20 [v2]

[Joe Darcy]

> Time to start getting ready for JDK 20...

Joe Darcy has updated the pull request incrementally with one additional commit since the last revision:

  Respond to review feedback.

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Changes:
  - all: https://git.openjdk.java.net/jdk/pull/8236/files
  - new: https://git.openjdk.java.net/jdk/pull/8236/files/49c871d9..96be1787

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=8236&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=8236&range=00-01

  Stats: 2 lines in 2 files changed: 0 ins; 0 del; 2 mod
  Patch: https://git.openjdk.java.net/jdk/pull/8236.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/8236/head:pull/8236

PR: https://git.openjdk.java.net/jdk/pull/8236