Author: Petr Skoda
MDL-24432 fixed guest role info
http://git.moodle.org/gw?p=moodle.git;a=commit;h=68aaaa45df3bf879586da17815c7d3afd3fb6d64
http://github.com/moodle/moodle/commit/68aaaa45df3bf879586da17815c7d3afd3fb6d64
+ 2.0 en [configguestroleid,core_admin]