[jdk21u-dev] RFR: 8334670: SSLSocketOutputRecord buffer miscalculation

[Goetz Lindenmaier]

I backport this for parity with 21.0.11-oracle.

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Commit messages:
 - Backport 07bc523df85fde81bf736fedac62874d3cb11ee3

Changes: https://git.openjdk.org/jdk21u-dev/pull/2547/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk21u-dev&pr=2547&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8334670
  Stats: 4 lines in 1 file changed: 0 ins; 0 del; 4 mod
  Patch: https://git.openjdk.org/jdk21u-dev/pull/2547.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u-dev.git pull/2547/head:pull/2547

PR: https://git.openjdk.org/jdk21u-dev/pull/2547