RFR: 410: Update mailing list bridge subject decorations

[Robin Westberg]

Hi all,

Please review this change that updates the subject decorations done by the mailing list bridge bot to reflect the
latest consensus.

Best regards,
Robin

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Commit messages:
 - Updated after latest list discussion

Changes: https://git.openjdk.java.net/skara/pull/662/files
 Webrev: https://webrevs.openjdk.java.net/skara/662/webrev.00
  Issue: https://bugs.openjdk.java.net/browse/SKARA-410
  Stats: 21 lines in 3 files changed: 1 ins; 0 del; 20 mod
  Patch: https://git.openjdk.java.net/skara/pull/662.diff
  Fetch: git fetch https://git.openjdk.java.net/skara pull/662/head:pull/662

PR: https://git.openjdk.java.net/skara/pull/662