message: Add table to SST engine doc
diff: @@ -149,3 +149,12 @@ between applications running on different interconnects, the Wide Area
  Network (WAN) option should be chosen. This value is interpreted by both
  SST Writer and Reader engines.
  +==================== ===================== =========================================================
  + **Key** **Value Format** **Default** and Examples
  +==================== ===================== =========================================================
  + RendezvousReaderCount integer **1**
  + RegistrationMethod string **File**, Screen
  + QueueLimit integer **0** (no queue limits)
  + QueueFullPolicy string **Block**, Discard
  + DataTransport string **default varies by platform**, RDMA, WAN
  +==================== ===================== =========================================================
  