event: update worker score keepalive status.

Correct regressions introduced in r1137358 and r1740910.

The conn_rec context may be passed only when setting up the
initial connection, otherwise the request info is trashed.


Follow up to r1740910: CHANGES entry.


Submitted by: ylavic, wrowe, ylavic
Reviewed by: ylavic, icing, jim


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.4.x@1821068 13f79535-47bb-0310-9956-ffa450edef68