[jdk21u-dev] RFR: 8338759: Add extra diagnostic to java/net/InetAddress/ptr/Lookup.java

[Goetz Lindenmaier]

I backport this for parity with 21.0.6-oracle.

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Commit messages:
 - Backport 118c9ade1a5e17d870415f689caa25af6524ab0e

Changes: https://git.openjdk.org/jdk21u-dev/pull/1080/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk21u-dev&pr=1080&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8338759
  Stats: 3 lines in 1 file changed: 3 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk21u-dev/pull/1080.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u-dev.git pull/1080/head:pull/1080

PR: https://git.openjdk.org/jdk21u-dev/pull/1080