Author: Eloy Lafuente
MDL-29844 Administration: Added new config for users to login for viewing profile image
http://git.moodle.org/gw?p=moodle.git;a=commit;h=e4b1208377ace2d49f07fac2332f70037a99354d
http://github.com/moodle/moodle/commit/e4b1208377ace2d49f07fac2332f70037a99354d
+ 2.2 en [forceloginforprofileimage,core_admin]
+ 2.2 en [forceloginforprofileimage_help,core_admin]