Author: Jun Pataleta
MDL-53974 backup: Add option to backup course competencies
http://git.moodle.org/gw?p=moodle.git;a=commit;h=45b9207d7eacc01ce86ff99bcf4868b192e227e5
http://github.com/moodle/moodle/commit/45b9207d7eacc01ce86ff99bcf4868b192e227e5
+ 3.1 en [rootsettingcompetencies,core_backup]