Add copyright to source files

tests/suites/_mgmt-functions.sh

@@ -1,4 +1,13 @@
 # -*- indent-tabs-mode: t; tab-width: 4; -*-
+#####
+##### This file is part of Mail-in-a-Box-LDAP which is released under the
+##### terms of the GNU Affero General Public License as published by the
+##### Free Software Foundation, either version 3 of the License, or (at
+##### your option) any later version. See file LICENSE or go to
+##### https://github.com/downtownallday/mailinabox-ldap for full license
+##### details.
+#####
+
 
 # Available REST calls:
 #