Merge branch 'master' into glitch-soc/merge-upstream

Conflicts:
- .github/ISSUE_TEMPLATE/bug_report.md
  Took our version.
- CONTRIBUTING.md
  Updated the embedded copy of upstream's version.
- README.md
  Took our version.
- app/policies/status_policy.rb
  Not a real conflict, took code from both.
- app/views/layouts/embedded.html.haml
  Added upstream's changes (dns-prefetch) and fixed
  `%body.embed`
- app/views/settings/preferences/show.html.haml
  Reverted some of upstream changes, as we have a
  page dedicated for flavours and skins.
- config/initializers/content_security_policy.rb
  Kept our version of the CSP.
- config/initializers/doorkeeper.rb
  Not a real conflict, took code from both.

app/views/admin/reports/show.html.haml

@@ -4,8 +4,10 @@
 %div{ style: 'overflow: hidden; margin-bottom: 20px' }
   - if @report.unresolved?
     %div{ style: 'float: right' }
-      = link_to t('admin.reports.silence_account'), admin_report_path(@report, outcome: 'silence'), method: :put, class: 'button'
-      = link_to t('admin.reports.suspend_account'), new_admin_account_suspension_path(@report.target_account_id, report_id: @report.id), class: 'button'
+      - if @report.target_account.local?
+        = link_to t('admin.accounts.disable'), admin_report_path(@report, outcome: 'disable'), method: :put, class: 'button button--destructive'
+      = link_to t('admin.accounts.silence'), admin_report_path(@report, outcome: 'silence'), method: :put, class: 'button button--destructive'
+      = link_to t('admin.accounts.perform_full_suspension'), new_admin_account_suspension_path(@report.target_account_id, report_id: @report.id), class: 'button button--destructive'
     %div{ style: 'float: left' }
       = link_to t('admin.reports.mark_as_resolved'), admin_report_path(@report, outcome: 'resolve'), method: :put, class: 'button'
   - else