Author: Gilles-Philippe Leblanc
MDL-42816 auth_manual: Add password expiry for manual auth method
http://git.moodle.org/gw?p=moodle.git;a=commit;h=2d35b7d3d8388d71b80694fd53aa3631411f434c
http://github.com/moodle/moodle/commit/2d35b7d3d8388d71b80694fd53aa3631411f434c
+ 2.7 en [expiration,auth_manual]
+ 2.7 en [expiration_desc,auth_manual]
+ 2.7 en [expiration_warning,auth_manual]
+ 2.7 en [expiration_warning_desc,auth_manual]
+ 2.7 en [passwdexpiretime,auth_manual]
+ 2.7 en [passwdexpiretime_desc,auth_manual]
+ 2.7 en [passwdexpire_settings,auth_manual]