[jdk11u-dev] RFR: 8223737: HostsFileNameService doesn't handle IPv6 literal addresses correctly

[Amos Shi]

Backport of [JDK-8223737](https://bugs.openjdk.org/browse/JDK-8223737)

Testing
- Local: Test passed on `MacOS 14.4.1`
  - `InternalNameServiceWithHostsFileTest.java`: Test results: passed: 1
- Pipeline: 
- Testing Machine:

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Commit messages:
 - Backport 23301277c56eff451a6ed7c50d635377d60d8a22 Manually merge
 - Backport 23301277c56eff451a6ed7c50d635377d60d8a22

Changes: https://git.openjdk.org/jdk11u-dev/pull/2683/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk11u-dev&pr=2683&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8223737
  Stats: 58 lines in 2 files changed: 22 ins; 18 del; 18 mod
  Patch: https://git.openjdk.org/jdk11u-dev/pull/2683.diff
  Fetch: git fetch https://git.openjdk.org/jdk11u-dev.git pull/2683/head:pull/2683

PR: https://git.openjdk.org/jdk11u-dev/pull/2683