Move reverse connection information into VNCSConnectionST

The only class that cares if connections are reversed or not is
VNCSConnectionST so let it keep track of this fact.
diff --git a/common/rfb/SConnection.h b/common/rfb/SConnection.h
index fd6d263..f154218 100644
--- a/common/rfb/SConnection.h
+++ b/common/rfb/SConnection.h
@@ -38,7 +38,7 @@
   class SConnection : public SMsgHandler {
   public:
 
-    SConnection(bool reverseConnection_);
+    SConnection();
     virtual ~SConnection();
 
     // Methods to initialise the connection
@@ -206,7 +206,6 @@
     SecurityServer *security;
     SSecurity* ssecurity;
     stateEnum state_;
-    bool reverseConnection;
     rdr::S32 preferredEncoding;
   };
 }