add disconnect plug

scripts/hooks/disconnect-plug-configurations

@@ -0,0 +1,6 @@
+#!/usr/bin/env bash
+set -e
+snapctl set server.basepath.dir=""
+snapctl set server.basepath.enforce=False
+snapctl get server | $SNAP/bin/update-settings "${SNAP_DATA}/settings.conf" update
+snapctl restart "${SNAP_NAME}.server"