RFR: 8308678: (fs) UnixPath::toRealPath needs additional permissions when running with SM (macOS) [v4]

[Brian Burkhalter]

> When not resolving links and the case retention algorithm cannot be run due to a security manager being in place with no read permissions for the tree to be traversed, then fall back to the result obtained without case correction.

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

  8308678: Change UnixPath::canRead to an instance method

-------------

Changes:
  - all: https://git.openjdk.org/jdk/pull/14157/files
  - new: https://git.openjdk.org/jdk/pull/14157/files/095db551..c91d7189

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=14157&range=03
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=14157&range=02-03

  Stats: 3 lines in 1 file changed: 0 ins; 0 del; 3 mod
  Patch: https://git.openjdk.org/jdk/pull/14157.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/14157/head:pull/14157

PR: https://git.openjdk.org/jdk/pull/14157