Some style cleanup and documenting of request.
Some style cleanup and documenting of request.

Shraddha512/rust-http,Shraddha512/rust-http,servo/rust-http,Shraddha512/rust-http,chris-morgan/rust-http,servo/rust-http,servo/rust-http,Shraddha512/rust-http,chris-morgan/rust-http,servo/rust-http,chris-morgan/rust-http,chris-morgan/rust-http,Shraddha512/rust-http