[jdk16u] RFR: 8252971: WindowsFileAttributes does not know about Unix domain sockets

[Michael McMahon]

Hi,

This is a backport of 8252971 to 16u. The patch applies cleanly.

- Michael

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Commit messages:
 - Backport 9ffabf30c33c87ae5347b7abc76c6a2c8b4fda01

Changes: https://git.openjdk.java.net/jdk16u/pull/47/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk16u&pr=47&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8252971
  Stats: 245 lines in 10 files changed: 228 ins; 10 del; 7 mod
  Patch: https://git.openjdk.java.net/jdk16u/pull/47.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk16u pull/47/head:pull/47

PR: https://git.openjdk.java.net/jdk16u/pull/47