Author: Tim Hunt
MDL-25357 Allow maximum number of sections to be set by the admin. Also allow 0 sections at an choice.
Also fix one bad <br/> in another lang string.
http://git.moodle.org/gw?p=moodle.git;a=commit;h=c141b05f7d091d02f12e926b72508cc5c85e53d2
http://github.com/moodle/moodle/commit/c141b05f7d091d02f12e926b72508cc5c85e53d2
+ 2.2 en [coursehelpnewsitemsnumber,core]
+ 2.2 en [maxnumberweeks,core]
+ 2.2 en [maxnumberweeks_desc,core]