Author: Petr Skoda
MDL-24432 changing the guest role explanation and renaming the text string to force new translation in all languages because the guest capabilities are completely changed in 2.0
http://git.moodle.org/gw?p=moodle.git;a=commit;h=f0a25c37c2c99b15fa464870a3bace2b5fdb7b2f
http://github.com/moodle/moodle/commit/f0a25c37c2c99b15fa464870a3bace2b5fdb7b2f
+ 2.0 en [guestroleid_help,core_admin]
- 2.0 en [configguestroleid,core_admin]