o Fix parsing of node states for sinfo -t, --states and store state ids

   in an int instead of a short (truncation was causing strange results,
   especially when ORed with NODE_NO_RESPOND flag).
 o No longer bother processing the '*' at end of node state strings.
   sinfo -t now shows both responding and non-responding nodes by
   default --responding or --dead can be used to choose one or the other.