Merge the rest of r627729 from trunk:

wordsmithing


Merge r409455 from trunk:
* Add a note about trailing slashes for ProxyPass and fix the balancer example
  accordingly.

PR: 39203

git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.2.x@663989 13f79535-47bb-0310-9956-ffa450edef68