Author: Dongsheng Cai
MDL-27289, upgrade box.net repository plugin to use new box.net authentication process
http://git.moodle.org/gw?p=moodle.git;a=commit;h=1c64c529517c1b10c4450af018a2f16de0f7a680
http://github.com/moodle/moodle/commit/1c64c529517c1b10c4450af018a2f16de0f7a680
+ 2.1 en [callbackurl,repository_boxnet]
+ 2.1 en [callbackurltext,repository_boxnet]
+ 2.1 en [callbackwarning,repository_boxnet]