RFR: Use quoting to direct comment threading

[Robin Westberg]

Hi all,

Please review this change that checks if a comment contains a quote from a previous post. If it does, that post will be
considered the parent when selecting which thread to post in. Also avoid automatic quoting in that case, to let the
user select what to quote.

Best regards,
Robin

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Commit messages:
 - Use quoting to direct comment threading

Changes: https://git.openjdk.java.net/skara/pull/495/files
 Webrev: https://webrevs.openjdk.java.net/skara/495/webrev.00
  Stats: 101 lines in 3 files changed: 99 ins; 0 del; 2 mod
  Patch: https://git.openjdk.java.net/skara/pull/495.diff
  Fetch: git fetch https://git.openjdk.java.net/skara pull/495/head:pull/495

PR: https://git.openjdk.java.net/skara/pull/495