fix https://github.com/acmesh-official/acme.sh/issues/3159

dnsapi/dns_ovh.sh

@@ -248,7 +248,7 @@ _ovh_authentication() {
 # _domain=domain.com
 _get_root() {
   domain=$1
-  i=2
+  i=1
   p=1
   while true; do
     h=$(printf "%s" "$domain" | cut -d . -f $i-100)