[jdk8u-dev] RFR: 8234484: Add ability to configure third port for remote JMX

[Vyom Tewari]

Reviewed-by: ksrini
Backport-of: f129cc43283a18cb5afdd1416b09691a636a7758

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Commit messages:
 - 8263231: Add ability to configure third port for remote JMX

Changes: https://git.openjdk.org/jdk8u-dev/pull/213/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk8u-dev&pr=213&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8234484
  Stats: 35 lines in 3 files changed: 30 ins; 2 del; 3 mod
  Patch: https://git.openjdk.org/jdk8u-dev/pull/213.diff
  Fetch: git fetch https://git.openjdk.org/jdk8u-dev pull/213/head:pull/213

PR: https://git.openjdk.org/jdk8u-dev/pull/213