fix hestiacp#949 reverting #0c98233

Author: Serghey Rodin

bin/v-add-dns-record

@@ -18,7 +18,7 @@ domain=$2
 record=$(idn -t --quiet -u "$3" )
 record=$(echo "$record" | tr '[:upper:]' '[:lower:]')
 rtype=$(echo "$4"| tr '[:lower:]' '[:upper:]')
-dvalue=$(idn -t --quiet -a "$5" )
+dvalue=$(idn -t --quiet -u "$5" )
 priority=$6
 id=$7
 restart=$8