Update for 2.18 now that 2.17 is released

Add some \subsubsection to have a decent generated output.

Remove the trailing ":" in titles to be slightly less aggresive.

git-svn-id: https://svn.apache.org/repos/asf/httpd/apreq/trunk@1903736 13f79535-47bb-0310-9956-ffa450edef68
1 file changed