Merge r344409 from trunk:

Remove a few obsolete historical references, clean up
some small inconsistencies, and use graceful-stop in
the upgrading example.



git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.2.x@344410 13f79535-47bb-0310-9956-ffa450edef68