Merge r1727544 from trunk:

* Ensure that proto_num and protocol is set in another "error out early" edge
  case. This can happen with invalid CONNECT requests as described in the PR.

PR: 58929

Submitted by: rpluem
Reviewed/backported by: jim


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.4.x@1729875 13f79535-47bb-0310-9956-ffa450edef68