archwiki: add DarkMode extension

See merge request archlinux/infrastructure!664

https://bugs.archlinux.org/task/71411

mailman: Reject most mails from nonmembers to reduce moderation workload

See merge request archlinux/infrastructure!657

All lists expect arch-mirrors-announce and aur-requests[1] require the
user to be a member before they can post. Moderating mails from
nonmembers are a lot of work and most of the mails are spam, so let's
just reject them. Mails to arch-mirrors-announce and aur-requests from
nonmembers will still be checked manually, as you aren't required to be
subscribed[1].

[1] https://wiki.archlinux.org/index.php?title=General_guidelines&oldid=750602#Reply_to_the_mailing_list

This fixes the unexpanded magic words in mails that we sometimes see.

archwiki: upgrade to 1.39.0-1

See merge request archlinux/infrastructure!666

In order to get access to the `killUser` command.

mastodon: add credentials to vault

See merge request archlinux/infrastructure!662

URL: https://fosstodon.org/@archlinux

Previously the task for creating an issue in archlinux-keyring to remove
a main key was bundled together with the similar task for packager keys.

Also introduce a task for removing the @master-key.archlinux.org email.

The format of the keyring issue creation tasks was modified in commit
d47c558c ("Improve .gitlab/issue_templates/Offboarding.md").

Improve .gitlab/issue_templates/Offboarding.md

See merge request archlinux/infrastructure!659

- Link to referenced files in the git repo.
- Use new issue URLs that preselect the issue template.
- Add dev and TU private IRC channels.

Add dev and TU private IRC channels to the onboarding issue template

See merge request archlinux/infrastructure!658

archwiki: show the main page's language button in the header

See merge request !660

Enable $wgVectorLanguageInMainPageHeader, so that the main page is consistent with other pages.
See https://www.mediawiki.org/wiki/Skin:Vector/2022#$wgVectorLanguageInMainPageHeader.

Compare: https://wiki.archlinux.org/?languageinmainpageheader=1 vs https://wiki.archlinux.org/?languageinmainpageheader=0

Discussed in https://wiki.archlinux.org/title/MediaWiki_talk:Common.css#Main_page_columns_and_Vector_2022_language_links.

- Add `ft=systemd` where needed
- Remove `ft=` where filetype detection works (especially jinja.vim)
- Set `sw=2 sts=-1 et` everywhere

Use the localpart for the default IRC nicknames instead of the display
name, which should make for more succinct nicks.

We have been using sponsored Equinix Metal boxes for years (sponsorship
managed by CNCF[1]). This adds a service account[2], so we don't need to
rely on individual access.

[1] https://github.com/cncf/cluster
[2] https://github.com/cncf/cluster/issues/213

Ref #485

aurweb: bump to v6.1.9

See merge request !661

Signed-off-by: Leonidas Spyropoulos <artafinde@archlinux.org>

Copy the latest dashboard from upstream, fixing the graphs.

Ref: rfcs!15

Similarly to geo.mirror.pkgbuild.com, this is monitored elsewhere.

Fix #475

No reason this should be 0600 as it doesn't contain any sensitive data;
switch it back to the package's default permissions of 0644.