Merge r349476 from trunk:

- try to add a note to explain the behaviour of clients use a pipelined
  connection wrt to MaxRequestsPerChild and KeepAlive.

Merge r413683 from trunk:
A little bit more detail, and an example, for how DocumentRoot is
handled. Examples good.

Merge r449032 from trunk:
Capitalization consistency
Submitted by Vincent Bray

Merge r649076 from trunk:
Replace reference to obsolete RFC. Submitted by: Igor Galić.

git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.2.x@655009 13f79535-47bb-0310-9956-ffa450edef68