Update syno_hdd_db.sh

- Fixed bug where expansion units ending in RP or II were not detected.
- Added a --restore option to undo all changes made by the script.
- Now looks for and edits both v7 and non-v7 db files to solve issue #11 for RS '21 models running DSM 6.2.4. This will also ensure the script still works if:
    - Synology append different numbers to the db file names in DSM 8 etc.
    - The detected NAS model name does not match the .db files' model name.
- Now backs up the .db.new files (as well as the .db files).
- Now shows max memory in GB instead of MB.
- Now shows status of "Support disk compatibility" setting even if it wasn't changed.
- Now shows status of "Support memory compatibility" setting even if it wasn't changed.

syno_hdd_db.sh

@@ -47,7 +47,6 @@
 #
 # Now shows status of "Support memory compatibility" setting even if it wasn't changed.
 #
-#
 # Improved shell output when editing max memory setting.
 #
 # Changed method of checking if drive is a USB drive to prevent ignoring internal drives on RS models.
@@ -139,7 +138,7 @@
 # Optionally disable "support_disk_compatibility".
 
 
-scriptver="v2.2.41"
+scriptver="v2.2.42"
 script=Synology_HDD_db
 repo="007revad/Synology_HDD_db"