Author: Andrew Davis
MDL-42215 lang: improved the help string for fullnamedisplay
http://git.moodle.org/gw?p=moodle.git;a=commit;h=5a47ef3827d42dcb837d81d7ea8a5ff9a71492ba
http://github.com/moodle/moodle/commit/5a47ef3827d42dcb837d81d7ea8a5ff9a71492ba
+ 2.6 en [configfullnamedisplay,core_admin]