make limiting features consistent across Gateway-MT and Link Sharing Service

[amwolff]

Goal

Gateway-MT has the per-macaroon head rate limiter and linksharing has a limit on the total number of requests as well as the ability to block certain paths. It would be valuable to make these options consistent.

Acceptance Criteria

• Implement the limit on the total number of requests in GW-MT
• Implement the per-macaroon head rate limiter in linksharing
• Make the per-macaroon head rate limiter have the ability to rate limit project IDs as well
• Make limiting options consistent under the same configuration key (e.g., --limits.[…])

Links