Developer credits
Git commits in Moodle 2.2.0 by Adrian
commit ec3c9dad7bc17690eaffc91526fddf0a4824577c Author: Adrian <adrian@kirkburnnand.com> Date: Thu, 22 Sep 2011 17:21:32 +0800 Tag: v2.2.0-beta MDL-28483 URL making url field required
commit ec3c9dad7bc17690eaffc91526fddf0a4824577c Author: Adrian <adrian@kirkburnnand.com> Date: Thu, 22 Sep 2011 17:21:32 +0800 Tag: v2.2.0-beta MDL-28483 URL making url field required