title: Rserve arguments: --save vs --no-save vs --vanilla
body: <p>I am trying to understand the difference between the Rserve arguments --save, --no-save, and --vanilla.  I don't see anything describing the effects of these in the documentation or any forums.  Does anyone know exactly what these do?</p>
  
  <p>In OSX, I need to specify one of these to run Rserve.</p>