Merge r1705099, r1705134 from trunk:

Don't count initial handshake I/O when determining the first byte.
PR58454

Submitted By: Konstantin J. Chernov
Committed By: covener




Avoid storing request stuff in r->connection->conn_config to
avoid problems with e.g. write completion.


Submitted by: covener
Reviewed/backported by: jim


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.4.x@1705666 13f79535-47bb-0310-9956-ffa450edef68