Author: Paul Holden
MDL-69492 auth_ldap: normalise member distinguished name config.
http://git.moodle.org/gw?p=moodle.git;a=commit;h=73e090e793ba3b55e2b839b840b044da13f95750
http://github.com/moodle/moodle/commit/73e090e793ba3b55e2b839b840b044da13f95750
+ 4.0 en [auth_ldap_memberattribute_isdn,auth_ldap]