[explorer/disks] Add license header

cdist/conf/explorer/disks

 #!/bin/sh -e
+#
+# based on previous work by other people, modified by:
+# 2020 Dennis Camera <dennis.camera at ssrq-sds-fds.ch>
+#
+# This file is part of cdist.
+#
+# cdist is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# cdist is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with cdist. If not, see <http://www.gnu.org/licenses/>.
+#
+# Finds disks of the system (excl. ram disks, floppy, cdrom)
 
 uname_s="$(uname -s)"