RFR: 8069345: (fs) FileTreeWalker throws NotDirectoryException on file junction points [v2]

[Brian Burkhalter]

> Improve support for Windows directory junctions.

Brian Burkhalter has updated the pull request incrementally with one additional commit since the last revision:

  8069345: Add os.family == windows to tests

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Changes:
  - all: https://git.openjdk.org/jdk/pull/21555/files
  - new: https://git.openjdk.org/jdk/pull/21555/files/bbb8567b..7d9067f3

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=21555&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=21555&range=00-01

  Stats: 2 lines in 2 files changed: 2 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/21555.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/21555/head:pull/21555

PR: https://git.openjdk.org/jdk/pull/21555