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=3deff6c9d2bb4ab3144b3ca7b93d6a2ef6a87af2
http://github.com/moodle/moodle/commit/3deff6c9d2bb4ab3144b3ca7b93d6a2ef6a87af2
+ 2.2 en [callbackurl,repository_boxnet]
+ 2.2 en [callbackurltext,repository_boxnet]
+ 2.2 en [callbackwarning,repository_boxnet]