[jdk17u-dev] RFR: 8300416: java.security.MessageDigestSpi clone can result in thread-unsafe clones

[Goetz Lindenmaier]

I would like to fix this in 17. 

Resolved Copyright, probably clean.

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Commit messages:
 - Backport 2e2e71e1fa326b8d30f018a3e0726bbcd6d24019

Changes: https://git.openjdk.org/jdk17u-dev/pull/3039/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=3039&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8300416
  Stats: 64 lines in 2 files changed: 58 ins; 0 del; 6 mod
  Patch: https://git.openjdk.org/jdk17u-dev/pull/3039.diff
  Fetch: git fetch https://git.openjdk.org/jdk17u-dev.git pull/3039/head:pull/3039

PR: https://git.openjdk.org/jdk17u-dev/pull/3039