Rename ConnParams to ClientParams

Now that we've split out server state to ServerParams, ConnParams
only contains state for a client. Rename the class and variables
to reflect this.
diff --git a/common/rfb/JpegCompressor.cxx b/common/rfb/JpegCompressor.cxx
index 27cb9de..23b8f8c 100644
--- a/common/rfb/JpegCompressor.cxx
+++ b/common/rfb/JpegCompressor.cxx
@@ -22,7 +22,7 @@
 #include <rdr/Exception.h>
 #include <rfb/Rect.h>
 #include <rfb/PixelFormat.h>
-#include <rfb/ConnParams.h>
+#include <rfb/ClientParams.h>
 
 #include <stdio.h>
 extern "C" {