Author: Eloy Lafuente (stronk7)
MDL-76674 core_lang: Add string for new America/Ciudad_Juarez
http://git.moodle.org/gw?p=moodle.git;a=commit;h=6257ac4de768a2f7280f28de96d9624c6fdf63cb
http://github.com/moodle/moodle/commit/6257ac4de768a2f7280f28de96d9624c6fdf63cb
+ 3.11 en [america/ciudad_juarez,core_timezones]