impl headers

[goiw111]

I worked on some headers, can you check the commit, please
goiw111@935e63c

[fafhrd91]

looks good. i am not sure if it us belongs to ntex though

[goiw111]

I thought it will be useful in ntex::web. anyway, I like all the work you made in that repo or actix-web and I want to be a part of that community.

[fafhrd91]

ok, sounds good. create pr then.

I don't think there is any community around ntex, so do not expect much attention.