From d10f40f109d417ba9810eefd482662ba44fec208 Mon Sep 17 00:00:00 2001
From: neilpang <neil@neilpang.com>
Date: Mon, 29 Apr 2019 21:44:25 +0800
Subject: [PATCH] fix idn issue.

---
 acme.sh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/acme.sh b/acme.sh
index 93ad83d6..0ce42ff5 100755
--- a/acme.sh
+++ b/acme.sh
@@ -1032,7 +1032,7 @@ _createkey() {
 _is_idn() {
   _is_idn_d="$1"
   _debug2 _is_idn_d "$_is_idn_d"
-  _idn_temp=$(printf "%s" "$_is_idn_d" | tr -d '0-9' | tr -d 'a-z' | tr -d 'A-Z' | tr -d '*.,-')
+  _idn_temp=$(printf "%s" "$_is_idn_d" | tr -d '0-9' | tr -d 'a-z' | tr -d 'A-Z' | tr -d '*.,-_')
   _debug2 _idn_temp "$_idn_temp"
   [ "$_idn_temp" ]
 }