message: Partially support OOCv1 shadowsocks server block
  OOCv1:
  Couldn't support "pluginName" because "plugin" is now used as a path
diff: @@ -115,7 +115,7 @@ struct SSConfig {
  udp_timeout: Option<u64>,
  #[serde(skip_serializing_if = "Option::is_none")]
  udp_max_associations: Option<usize>,
  - #[serde(skip_serializing_if = "Option::is_none")]
  + #[serde(skip_serializing_if = "Option::is_none", alias = "shadowsocks")]
  servers: Option<Vec<SSServerExtConfig>>,
  #[serde(skip_serializing_if = "Option::is_none")]
  locals: Option<Vec<SSLocalExtConfig>>,
  