message: Mention `--reflect-config` in the config docs
  Summary: Give instructions how to find the complete JSON config.
diff: @@ -116,3 +116,14 @@ Options for each pass are documented with that pass.
  class/field/method names to obfuscated names. This option is useful if you
  are running ReDex after ProGuard, so that ReDex will properly understand
  obfuscated names.
  +
  +# Complete configuration
  +
  +To see the (almost) complete list of configuration parameters, run
  +```
  +redex-all --reflect-config
  +```
  +(Note that you run `redex-all` here, not the `redex.py` wrapper!)
  +
  +This emits a JSON document detailing parameters, their types, defaults and
  +possibly documentation.
  