Example in configuration comment should use a path

consistent with the default configuration.

PR 52715.

Backport from trunk of r1241069 and 1241071.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.4.x@1293800 13f79535-47bb-0310-9956-ffa450edef68