Simplify and correct torrc
  * Turn on SafeLogging (why was it off?!?)
  * Don't behave as exit node (why was this on?!)
  * Set datadir to be compatible with the rest of configuration
  * Remove lines that seemed to refer to dymanic content (grains/pillars?): no coherent SLS state exists
  * Some dynamic content may appear again later, together with relevant SLS content