Author: Juan Leyva
MDL-56092 auth_email: New WS auth_email_get_signup_settings
http://git.moodle.org/gw?p=moodle.git;a=commit;h=4e2f7e0cd85dd19bb19e1f2fbc608d378210a510
http://github.com/moodle/moodle/commit/4e2f7e0cd85dd19bb19e1f2fbc608d378210a510
+ 3.2 en [registrationdisabled,core_error]