Author: Mark Nelson
MDL-60969 auth_ldap: replace hardcoded strings in config settings
http://git.moodle.org/gw?p=moodle.git;a=commit;h=ec1aa434488d0310bebeda0f33db6e2a21d850f7
http://github.com/moodle/moodle/commit/ec1aa434488d0310bebeda0f33db6e2a21d850f7
+ 3.3 en [auth_ldap_expiration_desc,auth_ldap]