Author: David Mudrak
MDL-29135 Reworded login prompt with SSO over MNet enabled
http://git.moodle.org/gw?p=moodle.git;a=commit;h=2f2cf818c2b1d8a6f6a4c12a13a7d74533f505ef
http://github.com/moodle/moodle/commit/2f2cf818c2b1d8a6f6a4c12a13a7d74533f505ef
+ 2.1 en [potentialidps,core_auth]