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/ZRLEEncoder.cxx b/common/rfb/ZRLEEncoder.cxx
index 8917d8f..92fd13d 100644
--- a/common/rfb/ZRLEEncoder.cxx
+++ b/common/rfb/ZRLEEncoder.cxx
@@ -19,7 +19,6 @@
 #include <rdr/OutStream.h>
 #include <rfb/Exception.h>
 #include <rfb/encodings.h>
-#include <rfb/ConnParams.h>
 #include <rfb/Palette.h>
 #include <rfb/SConnection.h>
 #include <rfb/ZRLEEncoder.h>
@@ -43,7 +42,7 @@
 
 bool ZRLEEncoder::isSupported()
 {
-  return conn->cp.supportsEncoding(encodingZRLE);
+  return conn->client.supportsEncoding(encodingZRLE);
 }
 
 void ZRLEEncoder::writeRect(const PixelBuffer* pb, const Palette& palette)