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/VNCSConnectionST.cxx b/common/rfb/VNCSConnectionST.cxx
index 746bb90..e261cfb 100644
--- a/common/rfb/VNCSConnectionST.cxx
+++ b/common/rfb/VNCSConnectionST.cxx
@@ -66,7 +66,7 @@
 
 VNCSConnectionST::VNCSConnectionST(VNCServerST* server_, network::Socket *s,
                                    bool reverse)
-  : SConnection(reverse), sock(s),
+  : sock(s), reverseConnection(reverse),
     queryConnectTimer(this), inProcessMessages(false),
     pendingSyncFence(false), syncFence(false), fenceFlags(0),
     fenceDataLen(0), fenceData(NULL),