Merge r1583007 from trunk:

mod_authn_socache: fix logging of bogus rv in r1576233

Submitted by: trawick
Reviewed by: jim, ylavic


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.4.x@1594538 13f79535-47bb-0310-9956-ffa450edef68