* Don't update consumed if we didn't see a new line
- The start line parser incorrectly updated the consumed cursor
when it attempted to find new lines across buffers. This change fixes
that and also removes passing the span by reference (which will be illegal).
- Added a unit test
Improves compliance with RFC 7230 on the expected handling of requests
that have URI or asterisk in the request target.
This means rejecting asterisk requests that are not OPTIONS and rejecting
authority-form requests taht are not CONNECT.
This also means the server will handle the path and query on targets
with absolute URIs as request-targets.