**Reason**
The Suhosin extension is grand total of 10 lines of important code, all to do with $wgResourceLoaderMaxQueryLength. However, most people don't consider the suhosin PHP extension to be valuable after PHP 5.4 - it's really for pre-PHP 5.3...which we're looong past.
In any case, the MediaWiki extension has little to no value, and should be archived. The documentation on <https://www.mediawiki.org/wiki/Manual:Suhosin> already covers everything that the extension does for you.
**To-do list**
- This task
-- [x] Add maintainers of the extension as subscribers to this task (if they have no apparent Phabricator account, notify them on-wiki or via email if possible and note it here).
-- [X] Add Phabricator project #MediaWiki-extensions-Suhosin as a tag for this task, or #mediawiki-extensions-other if there is no project.
- On-wiki documentation
-- [X] Archive documentation on `mediawiki.org` (https://www.mediawiki.org/wiki/Extension:Suhosin): replace page contents with `{{TNT|Archived extension|last revision id before archiving|reason=Per [[phab:T205684]]}}`, include a link to this task in the `reason` parameter.
-- [ ] Archive Wikidata item associated with documentation page (https://www.wikidata.org/wiki/Q21678759) (remove nearly all statements, except `instance of (P31) = MediaWiki extension (Q6805426)`, which should add a qualifier `end time (P582) = the YYYY-MM-DD date that you decided to archive extension/skin, generally per edit history`, change English (and other languages if possible) description to "archived MediaWiki extension" (and its translation)).
- Phabricator
-- [x] Archive Phabricator project #MediaWiki-extensions-Suhosin for the extension/skin.
-- [x] Mark all Phabricator tasks for the extension/skin either Declined or Invalid.
-- [x] Edit Phabricator project #MediaWiki-extensions-Suhosin description for the extension/skin with a link to this ticket.
- Translatewiki.net/translations
-- [ ] Remove from `translatewiki.net` (`groups/MediaWiki/mediawiki-extensions.txt`) (add #translatewiki.net project as a tag for this task).
- Configuration/tests/integrations/etc.
-- [ ] Remove from `mediawiki/extensions` (along with in `.gitmodules`).
-- [ ] Remove tests in [[ https://gerrit.wikimedia.org/g/integration/config | `integration/config` ]] (`zuul/layout.yaml`).
- Repositories
-- [ ] Empty repository and add an ARCHIVED file.
-- [ ] Archive the diffusion repository for the extension/skin: (rESUH).
-- [ ] Mark the repository read-only in Gerrit: (https://gerrit.wikimedia.org/r/admin/projects/mediawiki/extensions/Suhosin).
-- [ ] Delete the GitHub mirror: (https://github.com/wikimedia/mediawiki-extensions-Suhosin).