8366261: Provide utility methods for sun.security.util.Password

[GoeLin]

src/java.base/share/classes/java/io/Console.java
Resolved several chunks

• import
• isTerminal() does not exist in 21, omitted.
• two chunks need to be implemented differently: replace istty() by the two
  new methods.
• place new methods in file

src/java.base/share/classes/jdk/internal/io/JdkConsoleImpl.java
Resolved because https://bugs.openjdk.org/browse/JDK-8330276: "Console methods with explicit Locale" is not in 21.

src/java.base/unix/native/libjava/Console_md.c
src/java.base/windows/native/libjava/Console_md.c
test/jdk/java/io/Console/ModuleSelectionTest.java
Trivial resolves.

Further I needed adaptions to make it compile, see extra commit.

---

Progress

• Change must be properly reviewed (1 review required, with at least 1 Reviewer)
• JDK-8366261 needs maintainer approval
• Change must not contain extraneous whitespace
• Commit message must refer to an issue

Issue

• JDK-8366261: Provide utility methods for sun.security.util.Password (Enhancement - P4)

Reviewers

• Ralf Schmelter (@schmelter-sap - Reviewer)

Reviewing

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❗ This change is not yet ready to be integrated.
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[openjdk]

This backport pull request has now been updated with issue from the original commit.

[mlbridge]

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• 00: Full (10193294)

[schmelter-sap]

Looks good.

[openjdk]

⚠️ @GoeLin This change is now ready for you to apply for maintainer approval. This can be done directly in each associated issue or by using the /approval command.