*) clean out some old crap from ap_config.h; other simplifications; don't

   include stuff randomly (let users include them explicitly)
*) toss ap_config_path.h -- we can put those values into ap_config_auto.h


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@88057 13f79535-47bb-0310-9956-ffa450edef68