request for $REDIRECTS DIR HOSTNAME/splat/one.html redirects with 301 and splat placeholder, 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