Developer credits
Git commits in Moodle 2.7.3 by Andrew Davis
commit ac9425c9938cb6202f8cecbcfef3b01a9d908960 Author: Andrew Davis <andrew@moodle.com> Date: Sun, 14 Sep 2014 20:49:16 +0800 Tag: v2.7.3 MDL-47238 core_user: added an error message if guests access user profiles and they aren't allowed to