[jdk17u-dev] RFR: 8249693: java/nio/channels/FileChannel/FileExtensionAndMap.java uses @ignore w/o bug id

[Goetz Lindenmaier]

I backport this for parity with 17.0.12-oracle.

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Commit messages:
 - Backport 819af69f408261f55af883ba015c1f6179236582

Changes: https://git.openjdk.org/jdk17u-dev/pull/2316/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=2316&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8249693
  Stats: 43 lines in 1 file changed: 37 ins; 1 del; 5 mod
  Patch: https://git.openjdk.org/jdk17u-dev/pull/2316.diff
  Fetch: git fetch https://git.openjdk.org/jdk17u-dev.git pull/2316/head:pull/2316

PR: https://git.openjdk.org/jdk17u-dev/pull/2316