RFR: 8289689: (fs) Re-examine the need for normalization to Unicode Normalization Format D (macOS) [v4]

[Brian Burkhalter]

> On macOS, perform file name normalization if and only if a specific system property is set.

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

  8289689: Clean up property handling

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Changes:
  - all: https://git.openjdk.org/jdk/pull/10885/files
  - new: https://git.openjdk.org/jdk/pull/10885/files/b420d2ce..42855d60

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=10885&range=03
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=10885&range=02-03

  Stats: 15 lines in 3 files changed: 1 ins; 0 del; 14 mod
  Patch: https://git.openjdk.org/jdk/pull/10885.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/10885/head:pull/10885

PR: https://git.openjdk.org/jdk/pull/10885