Author: Dan Marsden
MDL-46805 SCORM: AICC restricts allowed characters in the username
http://git.moodle.org/gw?p=moodle.git;a=commit;h=ef88aa29385793d709eb6b49339290802c790c65
http://github.com/moodle/moodle/commit/ef88aa29385793d709eb6b49339290802c790c65
+ 2.9 en [aiccuserid,mod_scorm]
+ 2.9 en [aiccuserid_desc,mod_scorm]