Author: Dan Poltawski
MDL-9214 - improve comment for custom login instructions
http://git.moodle.org/gw?p=moodle.git;a=commit;h=662ddae6c2718f77994c33b6a5dce099e3d8fdf3
http://github.com/moodle/moodle/commit/662ddae6c2718f77994c33b6a5dce099e3d8fdf3
+ 2.2 en [authinstructions,core_auth]