Author: Juan Leyva
MDL-66501 tool_mobile: Prevent URLs in custom scheme
http://git.moodle.org/gw?p=moodle.git;a=commit;h=d4985a77391123c5959db432c076328f8d5e3624
http://github.com/moodle/moodle/commit/d4985a77391123c5959db432c076328f8d5e3624
+ 3.8 en [forcedurlscheme,tool_mobile]