Modified consume_optional_lws.
Modified consume_optional_lws.

It handles arbitrary lenth LWS now.

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