[jdk17u-dev] RFR: 8282293: Domain value for system property jdk.https.negotiate.cbt should be case-insensitive

[Martin Doerr]

Clean backport of [JDK-8282293](https://bugs.openjdk.java.net/browse/JDK-8282293)
on top of https://git.openjdk.java.net/jdk17u-dev/pull/349

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Depends on: https://git.openjdk.java.net/jdk17u-dev/pull/349

Commit messages:
 - Backport 86015e15a5105a779ee065cca64479c8d4fbc074

Changes: https://git.openjdk.java.net/jdk17u-dev/pull/350/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk17u-dev&pr=350&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8282293
  Stats: 11 lines in 2 files changed: 8 ins; 0 del; 3 mod
  Patch: https://git.openjdk.java.net/jdk17u-dev/pull/350.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk17u-dev pull/350/head:pull/350

PR: https://git.openjdk.java.net/jdk17u-dev/pull/350