[jdk17u-dev] RFR: 8360539: DTLS handshakes fails due to improper cookie validation logic

[Goetz Lindenmaier]

I backport this for parity with 17.0.19-oracle

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Commit messages:
 - backport a471fe992fc0d71ba65b5fdbcc44b97a2783b90a

Changes: https://git.openjdk.org/jdk17u-dev/pull/4238/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=4238&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8360539
  Stats: 2 lines in 1 file changed: 0 ins; 0 del; 2 mod
  Patch: https://git.openjdk.org/jdk17u-dev/pull/4238.diff
  Fetch: git fetch https://git.openjdk.org/jdk17u-dev.git pull/4238/head:pull/4238

PR: https://git.openjdk.org/jdk17u-dev/pull/4238