RFR: 8266291: (jrtfs) Calling Files.exists may break the JRT filesystem [v2]

[Athijegannathan Sundararajan]

> Problematic paths that start with /modules/modules prefix are handled properly

Athijegannathan Sundararajan has updated the pull request incrementally with one additional commit since the last revision:

  edited comment as per code review.

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Changes:
  - all: https://git.openjdk.java.net/jdk/pull/4022/files
  - new: https://git.openjdk.java.net/jdk/pull/4022/files/ba288d93..92611cbb

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=4022&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=4022&range=00-01

  Stats: 1 line in 1 file changed: 0 ins; 1 del; 0 mod
  Patch: https://git.openjdk.java.net/jdk/pull/4022.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/4022/head:pull/4022

PR: https://git.openjdk.java.net/jdk/pull/4022