[jdk17u] RFR: 8282444: Module finder incorrectly assumes default file system path-separator character [v2]

[Chris Hegarty]

> Backport of JDK-8282444

Chris Hegarty has refreshed the contents of this pull request, and previous commits have been removed. The incremental views will show differences compared to the previous content of the PR. The pull request contains one new commit since the last revision:

  Backport 369291b265e13d625c5f465da9b1854c0d70c435

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Changes:
  - all: https://git.openjdk.java.net/jdk17u/pull/335/files
  - new: https://git.openjdk.java.net/jdk17u/pull/335/files/88051c25..3d7a303c

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk17u&pr=335&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=jdk17u&pr=335&range=00-01

  Stats: 0 lines in 0 files changed: 0 ins; 0 del; 0 mod
  Patch: https://git.openjdk.java.net/jdk17u/pull/335.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk17u pull/335/head:pull/335

PR: https://git.openjdk.java.net/jdk17u/pull/335