Author: David Mudrák
MDL-69772 admin: Better validation for the allcountrycodes setting
The patch introduces a new admin_setting fiela type that can be used for
specifying comma separated list of countries. The field has inbuilt
validation so that only valid country codes can be inserted.
http://git.moodle.org/gw?p=moodle.git;a=commit;h=271b94ff4f42c2ddb479a725bce661de3367aba0
http://github.com/moodle/moodle/commit/271b94ff4f42c2ddb479a725bce661de3367aba0
+ 3.9 en [invalidcountrycode,core_error]