[jdk8u-dev] RFR: 8287011: Improve container information [v2]

[Jonathan Dowland]

> Low-risk backport for Oracle parity. Improves diagnostic output for humans. Not quite clean: path shuffling; comment copyright line adjustments; context issues as jdk8u lacks the pid controller (JDK-8266490)

Jonathan Dowland has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase.

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Changes:
  - all: https://git.openjdk.org/jdk8u-dev/pull/725/files
  - new: https://git.openjdk.org/jdk8u-dev/pull/725/files/72d46f63..72d46f63

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk8u-dev&pr=725&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk8u-dev&pr=725&range=00-01

  Stats: 0 lines in 0 files changed: 0 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk8u-dev/pull/725.diff
  Fetch: git fetch https://git.openjdk.org/jdk8u-dev.git pull/725/head:pull/725

PR: https://git.openjdk.org/jdk8u-dev/pull/725