move-machine.sh: update/fix usage message

ROOT/DEBIAN/control

@@ -3,6 +3,6 @@ Priority: optional
 Section: otherosfs
 Maintainer: Chemistry COs <support@ch.cam.ac.uk>
 Architecture: all
-Version: 0.9-ch88
+Version: 0.9-ch89
 Depends: zfs-dkms, postgresql-13 | postgresql-9.5 | postgresql-9.4 , liblockfile-simple-perl, libdbi-perl, libjson-perl, libzfs-perl-chem, libnet-openssh-perl, libdbd-pg-perl, mbuffer, rsync, nfs-kernel-server, pv, libwww-curl-perl
 Description: a backup system using ZFS (repository 'backup-scheduler')

ROOT/usr/lib/chem-zfs-backup-server/move-machine.sh

@@ -12,9 +12,9 @@ function dosql() {
 
 # 
 if [ -z "$1" ] ; then
- echo Usage: $0 machine [new-zfs]
- echo Moves the named machine onto a new ZFS
- echo If the new-zfs parameter is empty, automatically choose the one with the most space
+ echo Usage: $0 machine_fqdn [new-zpool]
+ echo Moves the named machine onto a new zpool
+ echo If the new-zpool parameter is empty, the one with the most space will automatically be chosen
  exit 1
 fi