message: fix gbk in win
diff: @@ -333,7 +333,7 @@ class ServerYamlConfChecker(object):
  raise SystemExit("Failed to prepare_server: only one of yml_file"
  " or yml_dict can be selected as the parameter.")
  if yml_file is not None:
  - with open(yml_file) as f:
  + with open(yml_file, encoding='utf-8') as f:
  conf = yaml.load(f.read())
  elif yml_dict is not None:
  conf = yml_dict
  