RFR: 8314323: TLS 1.3 Hybrid Key Exchange

Fri Oct 3 00:03:20 UTC 2025

Implement hybrid key exchange support for TLS 1.3 by adding three post-quantum hybrid named groups: X25519MLKEM768, SecP256r1MLKEM768, and SecP384r1MLKEM1024.
Please see [JEP 527](https://openjdk.org/jeps/527) for details about this change.

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Commit messages:
 - 8314323: TLS 1.3 Hybrid Key Exchange
 - Merge
 - 8314323: TLS 1.3 Hybrid Key Exchange

Changes: https://git.openjdk.org/jdk/pull/27614/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=27614&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8314323
  Stats: 1728 lines in 23 files changed: 1619 ins; 46 del; 63 mod
  Patch: https://git.openjdk.org/jdk/pull/27614.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/27614/head:pull/27614

PR: https://git.openjdk.org/jdk/pull/27614