fix#161
Current request router was organically grown, and is getting messier and messier with each addition.
This router cover exaustively existing API endpoints (with exceptions listed in [#161(comment)](Deuxfleurs/garage#161 (comment)) either because new and old api endpoint can't feasabily be differentied, or it's more lambda than s3).
Co-authored-by: Trinity Pointard <trinity.pointard@gmail.com>
Reviewed-on: Deuxfleurs/garage#163
Reviewed-by: Alex <alex@adnab.me>
Co-authored-by: trinity-1686a <trinity.pointard@gmail.com>
Co-committed-by: trinity-1686a <trinity.pointard@gmail.com>
