RFR: Check updated PRs for mailing list archive bridging

[Robin Westberg]

Hi all,

Please review this change that introduces support for fetching pull requests updated after a certain time/date. This allows catching comments made to closed PRs, without having to check every closed PR (which would be too expensive). 

Since certain forges (e.g. GitLab) do not update the updatedAt on every type of update, perform the regular check on all open issues periodically as well to catch any such updates.

Best regards,
Robin

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Commits:
 - 0e715511: Check updated PRs for mailing list archive bridging to catch comments on closed PRs

Changes: https://git.openjdk.java.net/skara/pull/433/files
 Webrev: https://webrevs.openjdk.java.net/skara/433/webrev.00
  Stats: 100 lines in 7 files changed: 90 ins; 0 del; 10 mod
  Patch: https://git.openjdk.java.net/skara/pull/433.diff
  Fetch: git fetch https://git.openjdk.java.net/skara pull/433/head:pull/433

PR: https://git.openjdk.java.net/skara/pull/433