Author: Ankit Agarwal
MDL-42891 adminstration: update strings and display for login fails
http://git.moodle.org/gw?p=moodle.git;a=commit;h=2b0c88e2f6bd388a3b4db3893b5c991585f8c8fc
http://github.com/moodle/moodle/commit/2b0c88e2f6bd388a3b4db3893b5c991585f8c8fc
+ 2.7 en [confignotifyloginfailures,core_admin]