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.
* Made changes to TakeSingleHeader
- Remove state machine and just parse in place
- Inline OnHeader into TakeSingleHeader
- Use IndexOfVectorized instead of custom indexof
- Normalize header whitespace error
- Combine IndexOf and IndexOfAny into a single IndexOfNameEnd call
Nate McMaster
Cesar Blum Silveira
Ben Adams
David Fowler