Author: Petr Skoda
MDL-31361 allow unenrolling of suspended users in enrol/database
http://git.moodle.org/gw?p=moodle.git;a=commit;h=4a635890003ed8a4ea7e0ce2341df923dcfd433a
http://github.com/moodle/moodle/commit/4a635890003ed8a4ea7e0ce2341df923dcfd433a
+ 2.3 en [database:unenrol,enrol_database]