Exclude Content-Length header

[gtrefs]

I really like the project and use it for my integration tests. I found a small issue while creating one of such tests: Jadler always returns a content-length header. Like David Parks mentioned here it would be nice to explicitly exclude this header from the response.

[jandudek]

Hi @gtrefs, thank you for using Jadler! I already considered an omitting content-length option for Jadler before, but I found the method mentioned by David Parks to be rather clumsy.

However, let me reconsider this once more. I'm planning on either upgrading the Jetty version or using some even more lightweight non-servlet http server, so maybe implementing this would be easier.

[gtrefs]

Nice. How about using Netty?

[jandudek]

I was considering the grizzly project lately. Will check netty as well.