Link to /my/preferences leads to 404 when not logged in

[techAPJ (Arpit Jalan)]

Fixed via:

https://github.com/discourse/discourse/commit/236833ed5de64d50ab87ac943ce8fb880a6c4eb1

This also fixes 404 for other /my/*path .. for example: Discourse Meta - The Official Support Forum for Discourse

Thanks for reporting this issue @tobiaseigen.