Author: Aparup Banerjee
MDL-29527 RSS : improved language string.
http://git.moodle.org/gw?p=moodle.git;a=commit;h=2cc4660758eab7bc8574c001e233753fecc43fb1
http://github.com/moodle/moodle/commit/2cc4660758eab7bc8574c001e233753fecc43fb1
+ 2.1 en [rsskeyshelp,core]