request for $REDIRECTS DIR HOSTNAME/posts/:year/:month/:day/:title redirects with 301 and placeholders, per redirects file (HTTP proxy)

Implementation	bifrost-gateway	boxo	kubo
Conformance Version	main	main	main
Total	✅8	✅8	✅8
Header Location	✅2	✅2	✅2
Status code	✅2	✅2	✅2