use less magic in http check

            Ok(Err(e)) => {

                if let tor_socksproto::Error::BadProtocol(version) = e {

                    // check for HTTP methods: CONNECT, DELETE, GET, HEAD, OPTION, PUT, POST, PATCH and

                    // TRACE

                    if b"CDGHOPT".contains(&version) {

                    // TRACE.

                    // To do so, check the first byte of the connection, which happen to be placed

                    // where SOCKs version field is.

                    if [b'C', b'D', b'G', b'H', b'O', b'P', b'T'].contains(&version) {

                        let payload = br#"HTTP/1.0 501 Tor is not an HTTP Proxy

Content-Type: text/html; charset=utf-8