Add AuthLDAPBindAuthoritative to allow other authentication providers a chance

to run when mod_authnz_ldap finds a user but can't verify their password.

Submitted By: Justin Erenkrantz, Joe Schaefer, Tony Stevenson



git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@881808 13f79535-47bb-0310-9956-ffa450edef68