Would be nice to have some sort of canonical definition

of server loading for Apache. So create a struct that
holds some useful data. The hope is that for those
platforms that lack getloadavg(), people will write
replacements.

git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@1389481 13f79535-47bb-0310-9956-ffa450edef68