Author: Daniel Neis Araujo
MDL-75218 theme: Add a Favicon setting
http://git.moodle.org/gw?p=moodle.git;a=commit;h=7adac1fefbeda10f1d52c99adfd72adac0da52a1
http://github.com/moodle/moodle/commit/7adac1fefbeda10f1d52c99adfd72adac0da52a1
+ 4.1 en [favicon,core_admin]
+ 4.1 en [favicon_desc,core_admin]