[jdk26u] RFR: 8373704: Improve "SocketException: Protocol family unavailable" message

[Matthias Baesken]

8373704: Improve "SocketException: Protocol family unavailable" message

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Commit messages:
 - Backport 163038222a371c07aff8bce50eee55bb389104d0

Changes: https://git.openjdk.org/jdk26u/pull/23/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk26u&pr=23&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8373704
  Stats: 2 lines in 2 files changed: 0 ins; 0 del; 2 mod
  Patch: https://git.openjdk.org/jdk26u/pull/23.diff
  Fetch: git fetch https://git.openjdk.org/jdk26u.git pull/23/head:pull/23

PR: https://git.openjdk.org/jdk26u/pull/23