Fuyumi

When accessing an "old" url such as `https://fr.vuejs.org/v2/guide/instance.html`, website redirects to the v2 website but trims the `.html` from the URL, thus leading to a 404 error  Edit :...

### Steps to Reproduce 1. Post something 2. Wait for someone to reply to you, using a backdated timestamp 3. You don't receive a notification Expected behaviour : You receive...