RFR: 8336: Socket Read rule should filter jfr recordings

[Marcus Hirt]

Also filtering /proc/self/smap as that is also a very "serviceability tool" thing to do.

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Commit messages:
 - Copyrights
 - Properties and spotless
 - 8336: Socket Read rule should filter jfr recordings

Changes: https://git.openjdk.org/jmc/pull/624/files
  Webrev: https://webrevs.openjdk.org/?repo=jmc&pr=624&range=00
  Issue: https://bugs.openjdk.org/browse/JMC-8336
  Stats: 96 lines in 8 files changed: 83 ins; 0 del; 13 mod
  Patch: https://git.openjdk.org/jmc/pull/624.diff
  Fetch: git fetch https://git.openjdk.org/jmc.git pull/624/head:pull/624

PR: https://git.openjdk.org/jmc/pull/624