Did not working dns_regru.sh with utf and punycode

Previous commit bd73823 broke everything: Certificates do not work on utf or punycode domains!

I tried to make both utf and unicode domains work.

Now this
acme.sh --issue --dns dns_regru --dnssleep 2500 -d 'сайт.рф' -d '*.сайт.рф' --debug

and this

acme.sh --issue --dns dns_regru --dnssleep 2500 -d 'xn--80aswg.xn--p1ai.рф' -d '*.xn--80aswg.xn--p1ai.рф' --debug

works perfect.

I need to work punycode domains due to "Error parsing certificate request: x509: SAN dNSName is malformed" in past with utf.

dnsapi/dns_regru.sh

@@ -91,18 +91,40 @@ _get_root() {
   _regru_rest POST "service/get_list" "username=${REGRU_API_Username}&password=${REGRU_API_Password}&output_format=xml&servtype=domain"
   domains_list=$(echo "${response}" | grep dname | sed -r "s/.*dname=\"([^\"]+)\".*/\\1/g")
 
-  for ITEM in ${domains_list}; do
-    IDN_ITEM=${ITEM}
-    case "${domain}" in
-    *${IDN_ITEM}*)
-      _domain="$(_idn "${ITEM}")"
-      _debug _domain "${_domain}"
-      return 0
-      ;;
-    esac
-  done
+  if [ "$(_idn "${domain}")" != "${domain}" ]; then
+
+    _debug "OK! UTF domain!"
+    for ITEM in ${domains_list}; do
+      case "${domain}" in
+      *${ITEM}*)
+        _domain=${ITEM}
+        _debug _domain "${_domain}"
+        return 0
+        ;;
+      esac
+    done
+
+    return 1
+
+  else
+
+    _debug "OK! Idn domain!"
+
+    for ITEM in ${domains_list}; do
+      IDN_ITEM="$(_idn "${ITEM}")"
+      case "${domain}" in
+      *${IDN_ITEM}*)
+        _domain=${IDN_ITEM}
+        _debug _domain "${_domain}"
+        return 0
+        ;;
+      esac
+    done
+
+    return 1
+
+  fi
 
-  return 1
 }
 
 #returns