[jdk17u-dev] RFR: 8357675: Amend headless message

[Goetz Lindenmaier]

Resolved copyright, probably clean anyways.

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Commit messages:
 - backport 12ee80cac754c1a6dd37191a9f80c01de8b659ad

Changes: https://git.openjdk.org/jdk17u-dev/pull/3890/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=3890&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8357675
  Stats: 3 lines in 1 file changed: 0 ins; 1 del; 2 mod
  Patch: https://git.openjdk.org/jdk17u-dev/pull/3890.diff
  Fetch: git fetch https://git.openjdk.org/jdk17u-dev.git pull/3890/head:pull/3890

PR: https://git.openjdk.org/jdk17u-dev/pull/3890