add debug info

dnsapi/dns_dp.sh

@@ -104,6 +104,7 @@ existing_records() {
   if _contains "$response" "Action completed successful"; then
     count=$(printf "%s" "$response" | grep '<type>TXT</type>' | wc -l | tr -d ' ')
     record_id=$(printf "%s" "$response" | grep '^<id>' | tail -1 | cut -d '>' -f 2 | cut -d '<' -f 1)
+    _debug record_id "$record_id"
     return 0
   else
     _err "get existing records error."