combine-stream: actually make use of resample.disable
resample.disable was made to default to true, but copying it to stream properties was forgotten so it didn't have any effect. Make sure to copy it.
This will also prevent different input/output streams from negotiating to different rates, which would result to broken audio since we are just passing sample data through.
combine-stream: check module arguments for syntax errors
Refuse to create module if the arguments were not properly parsed.