Merge r1225380:

Fix segfault when trying to log a nameless valueless cookie

PR: 52256
Submitted by: Rainer Canavan <rainer-apache 7val com>


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.4.x@1225385 13f79535-47bb-0310-9956-ffa450edef68