effective config doesn't include advanced.config mods

This is a tricky one, I'd like to get one of the following solutions in for riak's 2.0 release:

### Option 1
simply cat the advanced.config at the end of the output of the effective conf. It will at least indicate to the user that these values are detected and being used.

### Option 2
Since we know which app.config values a cuttlefish variable will effect, we could include some kind of indicator that it is overridden in advanced.config.

e.g.
```
some.setting.a = on
## some.setting.b is overriden in advanced.config's 'erlang_library.variable'
## some.setting.b = off
```

I think this option is more friendly to commandline querying of effective confs. grep etc...