Author: Dan Poltawski
MDL-9214 - improve comment for custom login instructions
http://git.moodle.org/gw?p=moodle.git;a=commit;h=31886e4651465cbcf5b6fd90b7485fb9e76a33f7
http://github.com/moodle/moodle/commit/31886e4651465cbcf5b6fd90b7485fb9e76a33f7
+ 2.3 en [authinstructions,core_auth]