SEP 9: Metadata: Document alts

A previous version of this proposal was called Frontmatter defined redirect rules. This was later changed to Metadata: document alts

Add a ‘redirects’ fontmatter element to site. Should support a list of alternate slugs that redirect to the canonical one, for when a url wants changing. Should also

Questions to answer:

Aliases

I like the idea of calling these aliases, because in a sense every URL is an alias in that it refers to the actual thing but is not in and of itself… that thing.

The new metadata element aliases would surplant the current slug element. This development does not address any of the webserver portion of implementing this behaviour.

Alternatively, alts or alt