Add a service configuration option to set the HTTP URI from the residual path

[olix0r]

For example, a request like:

GET /book HTTP/1.1

Would be sent as:

GET /api/published
content-length: 0
l5d-dst-service: /svc/book
Via: 1.0 linkerd
l5d-dst-client: /$/inet/10.0.0.2/8080
l5d-dst-residual: /api/published

Because this has to occur after retries, we should be careful to only ever set (and not modify) the request's URI. Otherwise, we have to take care to preserve the original URI across retries.

[klingerf]

I'm not sure I follow this. Should the example request be GET /book/api/published HTTP/1.1? Instead of GET /book HTTP/1.1?

[olix0r]

sorry, assume a dtab rule like /svc/book => /$/inet/10.0.0.2/8080/api/published

[klingerf]

Ahhh, ok, makes sense. Thanks for the clarification.