message: Document HTTP basic auth in the help page of the guide
diff: @@ -394,6 +394,33 @@ or in JSON form (prettified):
  }
  ```
  +## Connecting to a full node protected by HTTP Basic Authentication
  +
  +To connect to a full node protected by [HTTP Basic Authentication][http-basic-auth],
  +specify the username and password in the `rpc_addr`, `grpc_addr` and `websocket_addr` settings
  +under the chain configuration in `config.toml`.
  +
  +Here is an example with username `hello` and password `world`, assuming the RPC, WebSocket and gRPC servers
  +listen on domain `mydomain.com` with TLS enabled (HTTPS/WSS).
  +
  +```toml
  +[[chains]]
  +id = 'my-chain-0'
  +
  +# ...
  +
  +rpc_addr = 'https://hello:world@mydomain.com:26657'
  +grpc_addr = 'https://hello:world@mydomain.com:9090'
  +websocket_addr = 'wss://hello:world@mydomain.com:26657/websocket'
  +
  +# ...
  +```
  +
  +> **Caution:** Warning: The "Basic" authentication scheme sends the credentials encoded but not encrypted.
  +> This would be completely insecure unless the exchange was over a secure connection (HTTPS/TLS).
  +
  +[http-basic-auth]: https://developer.mozilla.org/en-US/docs/Web/HTTP/Authentication
  +
  ## Patching `gaia` to support `ChanCloseInit`
  The guide below refers specifically to patching your gaia chain so that the
  