Basic infrastructure to support fences.


git-svn-id: svn://svn.code.sf.net/p/tigervnc/code/trunk@4798 3789f03b-4d11-0410-bbf8-ca57d06f2519
diff --git a/common/rfb/ConnParams.h b/common/rfb/ConnParams.h
index f81a358..35e0605 100644
--- a/common/rfb/ConnParams.h
+++ b/common/rfb/ConnParams.h
@@ -80,6 +80,7 @@
     bool supportsLastRect;
 
     bool supportsSetDesktopSize;
+    bool supportsFence;
 
     bool customCompressLevel;
     int compressLevel;