RFR: 8285517: System.getenv() returns unexpected value if environment variable has non ASCII character [v3]

[Ichiroh Takiguchi]

> On JDK19 with Linux ja_JP.eucjp locale,
> System.getenv() returns unexpected value if environment variable has Japanese EUC characters.
> It seems this issue happens because of JEP 400.
> Arguments for ProcessBuilder have same kind of issue.

Ichiroh Takiguchi has updated the pull request incrementally with one additional commit since the last revision:

  8285517: System.getenv() returns unexpected value if environment variable has non ASCII character

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Changes:
  - all: https://git.openjdk.java.net/jdk/pull/8378/files
  - new: https://git.openjdk.java.net/jdk/pull/8378/files/050dd663..9db79874

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=8378&range=02
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=8378&range=01-02

  Stats: 156 lines in 5 files changed: 83 ins; 50 del; 23 mod
  Patch: https://git.openjdk.java.net/jdk/pull/8378.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/8378/head:pull/8378

PR: https://git.openjdk.java.net/jdk/pull/8378