RFR: 8331682: Slow networks/Impatient clients can potentially send unencrypted TLSv1.3 alerts that won't parse on the server [v9]

[Artur Barashev]

> https://bugs.openjdk.org/browse/JDK-8331682

Artur Barashev has updated the pull request incrementally with one additional commit since the last revision:

  Use 'useTLS13PlusSpec()' instead of comparing the version to TLS13. This improves the odds that we won't need to fix this issue again when TLS1.4 comes out

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Changes:
  - all: https://git.openjdk.org/jdk/pull/21043/files
  - new: https://git.openjdk.org/jdk/pull/21043/files/8ce7d623..f72bab25

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=21043&range=08
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=21043&range=07-08

  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/21043.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/21043/head:pull/21043

PR: https://git.openjdk.org/jdk/pull/21043