Changed `rx-debug` to `debug-rx` as it's actually called.

Maybe it should be the other way around? I'm also wondering if rather than having `debug-rx` be a wrapper around a call to `rx`, it should rather act like `rx` does but also output debug-info to the console? It's a small change but I think adding `-debug` at the end of `rx` to turn on debugging would be easier than adding a separate wrapper around it.