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/SMsgWriter.h b/common/rfb/SMsgWriter.h
index e985941..2db147b 100644
--- a/common/rfb/SMsgWriter.h
+++ b/common/rfb/SMsgWriter.h
@@ -31,12 +31,12 @@
 
 namespace rfb {
 
-  class ConnParams;
+  class ClientParams;
   struct ScreenSet;
 
   class SMsgWriter {
   public:
-    SMsgWriter(ConnParams* cp, rdr::OutStream* os);
+    SMsgWriter(ClientParams* client, rdr::OutStream* os);
     virtual ~SMsgWriter();
 
     // writeServerInit() must only be called at the appropriate time in the
@@ -140,7 +140,7 @@
     void writeLEDStateRect(rdr::U8 state);
     void writeQEMUKeyEventRect();
 
-    ConnParams* cp;
+    ClientParams* client;
     rdr::OutStream* os;
 
     int nRectsInUpdate;