[jdk17u-dev] RFR: 8324668: JDWP process management needs more efficient file descriptor handling

[Dmitry Cherepanov]

The original patch applies almost cleanly except for copyright years

Additional testing: passed local test1-4 testing on macos-aarch64

It's needed as a prerequisite to fix JDK-8324577 (already backported to JDK 21)

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Commit messages:
 - 8324668: JDWP process management needs more efficient file descriptor handling

Changes: https://git.openjdk.org/jdk17u-dev/pull/2557/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=2557&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8324668
  Stats: 121 lines in 1 file changed: 106 ins; 12 del; 3 mod
  Patch: https://git.openjdk.org/jdk17u-dev/pull/2557.diff
  Fetch: git fetch https://git.openjdk.org/jdk17u-dev.git pull/2557/head:pull/2557

PR: https://git.openjdk.org/jdk17u-dev/pull/2557