add warning to add LABEL when formating

The importance of this seems to be unclear to users, because they clearly don't read docs.
I commit directly to devel, thinking you'd agree ;-) I would have used create new branch if not.

Author: ovpc

etc/ncp-config.d/nc-automount.cfg

@@ -3,7 +3,7 @@
   "name": "Nc-automount",
   "title": "nc-automount",
   "description": "Automount USB drives by plugging them in",
-  "info": "Plugged in USB drives will be automounted under /media\non boot or at the moment of insertion.\n\nFormat your drive as ext4/btrfs in order to move NC datafolder or database\nVFAT or NTFS is not recommended for this task, as it does not suport permissions\n\nIMPORTANT: halt or umount the drive before removing",
+  "info": "Plugged in USB drives will be automounted under /media\non boot or at the moment of insertion.\n\nFormat your drive as ext4/btrfs in order to move NC datafolder or database. \n\nVFAT or NTFS is not recommended for this task, as it does not suport permissions \n\n WARNING If you want add a second drive later, make sure you have added a LABEL to the first and all other drives to be mounted when formating, as they will then be mounted at /media/LABEL instead of /media/USBdrive \n\nIMPORTANT: halt or umount the drive before removing",
   "infotitle": "Automount notes",
   "params": [
     {