Handling of RFC7540 8.1.2.5 about h2

[nox]

I don't know if that should be done but at the very least it shouldn't be done by Hyper, as it would be weird for Hyper to do it only for HTTP/2 (as nothing in HTTP/1.1 says they must be concatenated before being passed to other stuff).

I feel like this has already been discussed in the past and the conclusion was that it isn't h2 nor Hyper's business to normalize Cookie headers.

[nox]

hyperium/hyper#2528

[valkum]

Thanks for linking to this in hyper. Would you be open to a PR documenting the behavior somewhere? I am not sure for the best place inside hyper, as hyper::header and hyper::Requestare just re-exports. But as this only affects HTTP/2, I think it makes more sense to document it inside the Inbound Streams block.