Acknowledge temporary file if disabled for "pihole -b" command

Signed-off-by: DL6ER <dl6er@dl6er.de>

advanced/Scripts/list.sh

@@ -13,6 +13,10 @@ basename=pihole
 piholeDir=/etc/"${basename}"
 whitelist="${piholeDir}"/whitelist.txt
 blacklist="${piholeDir}"/blacklist.txt
+if [[ "${BLOCKING_ENABLED}" == false ]]; then
+  blacklist="${blacklist}.bck"
+fi
+
 readonly regexlist="/etc/pihole/regex.list"
 reload=false
 addmode=true