[JENKINS-64035] - Winstone 5.12: Update Jetty from 9.4.30.v20200611 to 9.4.33.v20201020

[oleg-nenashev]

The 9.4.33.v20201020 Jetty version picks up an upstream fix for jetty/jetty.project#5417 which caused JENKINS-63958 in Jenkins 2.261 and was worked around by downgrading Jetty in Winstone 5.11.1 and Jenkins 2.263. It would be great to include the new version into the weekly release, and then, maybe, consider it for backporting to 2.263.x LTS if the community ratings are fine.

Proposed changelog entries

• Winstone 5.12: Update Jetty from 9.4.30.v20200611 to 9.4.33.v20201020
  • Full Winstone 5.12 changelog: https://github.com/jenkinsci/winstone/releases/tag/winstone-5.12

Proposed upgrade guidelines

N/A

Submitter checklist

• (If applicable) Jira issue is well described
• Changelog entries and upgrade guidelines are appropriate for the audience affected by the change (users or developer, depending on the change). Examples
  • Fill-in the Proposed changelog entries section only if there are breaking changes or other changes which may require extra steps from users during the upgrade
• Appropriate autotests or explanation to why this change has no tests
• For dependency updates: links to external changelogs and, if possible, full diffs

Desired reviewers

@mention

Maintainer checklist

Before the changes are marked as ready-for-merge:

• There are at least 2 approvals for the pull request and no outstanding requests for change
• Conversations in the pull request are over OR it is explicit that a reviewer does not block the change
• Changelog entries in the PR title and/or Proposed changelog entries are correct
• Proper changelog labels are set so that the changelog can be generated automatically
• If the change needs additional upgrade steps from users, upgrade-guide-needed label is set and there is a Proposed upgrade guidelines section in the PR title. (example)
• If it would make sense to backport the change to LTS, a Jira issue must exist, be a Bug or Improvement, and be labeled as lts-candidate to be considered (see query).

[Wadeck]

👍

[oleg-nenashev]

@jenkinsci/core I suggest an expedited merge of this pull request into 2.264. It would help us to collect more community feedback and decide whether the new Jetty release can be [threoretically] backported into 2.263.1

[oleg-nenashev]

We may merge it tomorrow at 9AM UTC if there is no negative feedback. Please see the merge process documentation for more information about the merge process

[timja]

We may merge it tomorrow at 9AM UTC if there is no negative feedback. Please see the merge process documentation for more information about the merge process

I suggest just merging after CI is green...

[jglick]

[oleg-nenashev]

OK, taking the feedback. 🚢 🇮🇹