Only work with the request target, not the line
Only work with the request target, not the line

As @evert notes, by allowing specifying the entire request line, we have
the possibility that it goes out of sync with the request method and
protocol version, which would lead to an inconsistent and invalid
message.

asika32764/http-message,swantrace/http-message,php-fig/http-message,alexmgit/http-message