RFR: 8366254: (fs) UnixException.translateToIOException should translate ELOOP to FileSystemLoopException [v2]

[Brian Burkhalter]

> Translate a `UnixException` with `errno == ELOOP` to `FileSystemLoopException` instead of the less specific `FileSystemException`.

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

  8366254: Improve error message for ELOOP

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Changes:
  - all: https://git.openjdk.org/jdk/pull/26966/files
  - new: https://git.openjdk.org/jdk/pull/26966/files/cf174cae..22ceb999

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=26966&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=26966&range=00-01

  Stats: 5 lines in 1 file changed: 1 ins; 0 del; 4 mod
  Patch: https://git.openjdk.org/jdk/pull/26966.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/26966/head:pull/26966

PR: https://git.openjdk.org/jdk/pull/26966