MDL-29093 auth - help string changed to VBFET suggestion
(very best favourite english translator, aka. Helen
http://git.moodle.org/gw?p=moodle.git;a=commit;h=53d2fe2ac10353e581c10c2107cf841e9083399c
http://github.com/moodle/moodle/commit/53d2fe2ac10353e581c10c2107cf841e9083399c
+ 2.2 en [authpreventaccountcreation_help,core_admin]