[jdk17u-dev] RFR: 8301701: java/net/DatagramSocket/DatagramSocketMulticasting.java should be hardened

[Goetz Lindenmaier]

I backport this for parity with 17.0.8-oracle.

I had to resolve the @run command.

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Commit messages:
 - Backport 5feb13b55d32fad8f533f52ee7bd63e2cf2d247c

Changes: https://git.openjdk.org/jdk17u-dev/pull/1433/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=1433&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8301701
  Stats: 69 lines in 1 file changed: 22 ins; 20 del; 27 mod
  Patch: https://git.openjdk.org/jdk17u-dev/pull/1433.diff
  Fetch: git fetch https://git.openjdk.org/jdk17u-dev.git pull/1433/head:pull/1433

PR: https://git.openjdk.org/jdk17u-dev/pull/1433