message: add document about socks5_auth_config_path
diff: @@ -466,6 +466,7 @@ Example configuration:
  // If not set, it will derive from the outer `mode`
  "mode": "tcp_and_udp",
  // OPTIONAL. Authentication configuration file
  + // Configuration file document could be found in the next section.
  "socks5_auth_config_path": "/path/to/auth.json"
  },
  {
  @@ -661,6 +662,24 @@ Example configuration:
  }
  ```
  +### SOCKS5 Authentication Configuration
  +
  +The configuration file is set by `socks5_auth_config_path` in `locals`.
  +
  +```jsonc
  +{
  + // Password/Username Authentication (RFC1929)
  + "password": {
  + "users": [
  + {
  + "user_name": "USERNAME in UTF-8",
  + "password": "PASSWORD in UTF-8"
  + }
  + ]
  + }
  +}
  +```
  +
  ### Environment Variables
  - `SS_SERVER_PASSWORD`: A default password for servers that created from command line argument (`--server-addr`)
  