This task is about making sure people are aware of the proposal to codify signature validation requirements  in MediaWiki's software.
- [x] Inform [TechCom](https://www.mediawiki.org/wiki/TechCom) of our plans to post this proposal //outside// of the [technical RFC process](https://www.mediawiki.org/wiki/Requests_for_comment).
-- Done: https://www.mediawiki.org/wiki/Topic:Vhyuz775bvt7tkn4
- [x] Publicize proposal in places on-wiki where contributors who have a stake in this change are likely to see it.
-- Done: https://en.wikipedia.org/wiki/Wikipedia:Village_pump_(technical)#Unbreaking_custom_signatures_in_software
- [x] Communicate on the proposal page  how long people will have to comment (31 March 2020, although of course it's not a strict deadline)