Author: Paul Holden
MDL-79089 tiny_html: define help link text language string.
http://git.moodle.org/gw?p=moodle.git;a=commit;h=57a12c73f9b40a1eddfc8c6af376f2ca657793f7
http://github.com/moodle/moodle/commit/57a12c73f9b40a1eddfc8c6af376f2ca657793f7
+ 4.3 en [helplinktext,tiny_html]