access_checker_ex runs immediately after access_checker, 
which both must run well before auth_checker. No other contrast is possible so
assuming this doc is just a typo.

access_checker vs. access_checker_ex is discussed here:

    Subject: svn commit: r964156 - in /httpd/httpd/trunk: docs/manual/developer/ include/ modules/aaa/ server/
    http://svn.apache.org/viewvc?rev=964156&view=rev



git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@1511878 13f79535-47bb-0310-9956-ffa450edef68