propose a 2.2.x-unique patch for PR45946.

We jump right into doing LDAP lookups before we know if we're configured 
for authorization.  Crawl through the requirements early and bail out when
no LDAP authz will be required.



git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.2.x@814450 13f79535-47bb-0310-9956-ffa450edef68