Author: Petr Škoda
MDL-21342 add user login lockout
http://git.moodle.org/gw?p=moodle.git;a=commit;h=b28247fe904d90530deef8ae6f51cc8772a89e62
http://github.com/moodle/moodle/commit/b28247fe904d90530deef8ae6f51cc8772a89e62
+ 2.5 en [lockoutduration,core_admin]
+ 2.5 en [lockoutduration_desc,core_admin]
+ 2.5 en [lockoutemailbody,core_admin]
+ 2.5 en [lockoutemailsubject,core_admin]
+ 2.5 en [lockouterrorunlock,core_admin]
+ 2.5 en [lockoutthreshold,core_admin]
+ 2.5 en [lockoutthreshold_desc,core_admin]
+ 2.5 en [lockoutwindow,core_admin]
+ 2.5 en [lockoutwindow_desc,core_admin]
+ 2.5 en [unlockaccount,core_admin]