Merge branch 'backupfilterfix' into 'master'

Make sure we prepend the host backup filter if we have one

See merge request !28

scripts/backstep-traceback-auto

@@ -99,6 +99,7 @@ do
 		--safe \
 		--deltas \
 		--create-timestamp-file \
+		--prepend-backup-filter \
 		"${LVM_SNAPSHOT_ARGS[@]}" \
 		"${BIND_MOUNT_ARGS[@]}" \
 		--email-subject "${PERIOD^^} $lv" \