RFR: JDK-8286666: JEP 429: Implementation of Scoped Values (Incubator) [v36]

[Andrew Haley]

> JEP 429 implementation.

Andrew Haley has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains 69 commits:

 - Merge https://github.com/openjdk/jdk into JDK-8286666
 - Feedback from reviewers
 - Feedback from reviewers
 - Unused variable
 - Cleanup
 - Cleanup
 - Merge branch 'JDK-8286666' of https://github.com/theRealAph/jdk into JDK-8286666
 - Update src/jdk.incubator.concurrent/share/classes/jdk/incubator/concurrent/ScopedValue.java
   
   Co-authored-by: Paul Sandoz <paul.d.sandoz at googlemail.com>
 - Reviewer feedback
 - Merge branch 'JDK-8286666' of https://github.com/theRealAph/jdk into JDK-8286666
 - ... and 59 more: https://git.openjdk.org/jdk/compare/dea2161f...702d7444

-------------

Changes: https://git.openjdk.org/jdk/pull/10952/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=10952&range=35
  Stats: 3333 lines in 62 files changed: 2909 ins; 254 del; 170 mod
  Patch: https://git.openjdk.org/jdk/pull/10952.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/10952/head:pull/10952

PR: https://git.openjdk.org/jdk/pull/10952