RFR: 5603: Version specific help links in event type missing result

[Jean-Philippe Bempel]

Falls back to Java 8 link if no version information

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Commit messages:
 - 5603: Version specific help links in event type missing result

Changes: https://git.openjdk.java.net/jmc/pull/158/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jmc&pr=158&range=00
  Issue: https://bugs.openjdk.java.net/browse/JMC-5603
  Stats: 145 lines in 3 files changed: 31 ins; 1 del; 113 mod
  Patch: https://git.openjdk.java.net/jmc/pull/158.diff
  Fetch: git fetch https://git.openjdk.java.net/jmc pull/158/head:pull/158

PR: https://git.openjdk.java.net/jmc/pull/158