Allow for easier routing between http server and multiple grpc servers

[xd009642]

I have two gRPC services in my server, my main server and the health check. I'm also adding a HTTP endpoint via warp. So I tried to do this and found things didn't quite work. Assuming I'm not doing anything egregiously wrong, there might be some changes to tonic-health and #272 or an equivalent may be required.

I've created an example repository here: https://github.com/xd009642/tonic-route-warp-example

In the mean time I'll start hosting two servers listening at different ports but it would be nice if this would work 😄

[LucioFranco]

Yeah, that PR is related we just need to find a way to return an easy to use service from the router.

[xd009642]

is there anything stopping #272 being merged? I saw there was one comment adding something but otherwise (at least to my untrained) eyes it looked pretty solid

[LucioFranco]

@xd009642 we just need to address #272 (comment)

[alce]

I believe this was resolved on #419. Please re-open if there are further questions.