RFR: 8296: No Java process should ever be PID 1 [v2]

[Hendrik]

> Happy to get feedback

Hendrik has updated the pull request incrementally with one additional commit since the last revision:

  8296: add solution text for rule

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Changes:
  - all: https://git.openjdk.org/jmc/pull/613/files
  - new: https://git.openjdk.org/jmc/pull/613/files/4f26a7dd..1e3f3cc7

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jmc&pr=613&range=01
 - incr: https://webrevs.openjdk.org/?repo=jmc&pr=613&range=00-01

  Stats: 40 lines in 4 files changed: 36 ins; 0 del; 4 mod
  Patch: https://git.openjdk.org/jmc/pull/613.diff
  Fetch: git fetch https://git.openjdk.org/jmc.git pull/613/head:pull/613

PR: https://git.openjdk.org/jmc/pull/613