Accept header available in context?

[JeanMertz]

I noticed that the PopulateRequestContext function does not transfer the Accept header from the request object to the context.

I'm using a custom ServerBefore function to add this header, but I was somewhat surprised, as the Accept header is something you use a lot when working with APIs that support multiple response formats.

[peterbourgon]

Does #516 do what you'd expect?

[JeanMertz]

It does, thank you for doing the work. I would've added it myself, but I didn't want to put in the "work" before I got some form of acknowledgement that this would be a good addition.

Either way, thank you, and keep up the good work with this project 👍