Backport r558718 to 2.2 [Demote use of AddType for cgi and remove redundant...

Backport r558718 to 2.2 [Demote use of AddType for cgi and remove redundant paragraph regarding DOCUMENT_ROOT]

git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.2.x@558766 13f79535-47bb-0310-9956-ffa450edef68