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=4b1634259af0d731ca59f989c3208507536006f7
http://github.com/moodle/moodle/commit/4b1634259af0d731ca59f989c3208507536006f7
+ 2.0 en [forceloginforprofileimage,core_admin]
+ 2.0 en [forceloginforprofileimage_help,core_admin]