[jdk21u-dev] RFR: 8355445: [java.nio] Use @requires tag instead of exiting based on "os.name" property value

Wed Feb 4 15:02:25 UTC 2026

I backport this for parity with 21.0.11-oracle.

Resolved InheritedChannelTest.java because
8338411: "Implement JEP 486: Permanently Disable the Security Manager" is not in 21.
Kept TEST_SRC as it is still used by the test.

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Commit messages:
 - backport 84f570c573f5c355cf55e05d06ddb383deb476ca

Changes: https://git.openjdk.org/jdk21u-dev/pull/2595/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk21u-dev&pr=2595&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8355445
  Stats: 43 lines in 7 files changed: 6 ins; 30 del; 7 mod
  Patch: https://git.openjdk.org/jdk21u-dev/pull/2595.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u-dev.git pull/2595/head:pull/2595

PR: https://git.openjdk.org/jdk21u-dev/pull/2595