chg: [vps] be slightly more informative about what to do with last command !minor

Signed-off-by: Valentin Lab <valentin.lab@kalysto.org>

bin/vps

@@ -260,7 +260,8 @@ mailcow:install-backup() {
         dest="${dest%%:*}"
     fi
 
-    info "You can run this following from an host having admin access to $dest:"
+    info "You can run this following command from an host having admin access to $dest:"
+    echo "   (Or send it to a backup admin of $dest)" >&2
     echo "ssh ${ssh_options[@]} myadmin@$dest ssh-key add '$(cat /var/lib/rsync/.ssh/id_rsa.pub)'"
 }
 
@@ -361,7 +362,8 @@ EOF
         dest="${dest%%:*}"
     fi
 
-    info "You can run this following from an host having admin access to $dest:"
+    info "You can run this following command from an host having admin access to $dest:"
+    echo "   (Or send it to a backup admin of $dest)" >&2
     public_key=$(ssh-keygen -y -f <(e "$private_key"$'\n'))
     echo "ssh ${ssh_options[@]} myadmin@$dest ssh-key add '$public_key ${service_name}@$host'"
 }