Author: Damyon Wiese
MDL-58090 oauth2: Improve help
Provide a link to the help for setting up an OAuth 2 service.
Part of MDL-58220
http://git.moodle.org/gw?p=moodle.git;a=commit;h=870a4a824ecaac80c3bc3f1eea133f0e32edef8c
http://github.com/moodle/moodle/commit/870a4a824ecaac80c3bc3f1eea133f0e32edef8c
+ 3.3 en [serviceshelp,tool_oauth2]