fix format

acme.sh

@@ -2433,11 +2433,17 @@ _checkConf() {
 #d , conf
 _isRealNginxConf() {
   _debug "_isRealNginxConf $1 $2"
-  if [ -f "$2" ] && grep "^ *server_name " "$2" | grep " $1" >/dev/null; then
-    return 0
-  else
-    return 1
+  if [ -f "$2" ]; then
+    for _fln in $(grep -n "^ *server_name.* $1" "$2" | cut -d : -f 1); do
+      _debug _fln "$_fln"
+      if [ "$_fln" ]; then
+        _listen=$(cat "$2" | _head_n "$_fln" | grep "^ *listen .*" | _tail_n 1)
       fi
+    done
+    return 0
+  fi
+
+  return 1
 }
 
 #restore all the nginx conf