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=d5670c612b798f4147583fe463ea39d874519f0b
http://github.com/moodle/moodle/commit/d5670c612b798f4147583fe463ea39d874519f0b
+ 2.1 en [coursehelpnewsitemsnumber,core]
+ 2.1 en [maxnumberweeks,core]
+ 2.1 en [maxnumberweeks_desc,core]