Adds rclone-parents, fixes some other files

files/scrub-nas.service

@@ -1,6 +1,11 @@
 [Unit]
 Description=Scrubs the NAS
+ConditionPathIsMountPoint=/var/mnt/nas
+RequiresMountsFor=/var/mnt/nas
 
 [Service]
+Nice=19
+IOSchedulingClass=idle
+KillSignal=SIGINT
 Type=oneshot
-ExecStart=btrfs scrub start /var/mnt/nas
+ExecStart=btrfs scrub start -B /var/mnt/nas