Move socket write event handling in to the RFB core

What to do when a socket is writeable should be handled in the
RFB core code as there may be other events we want to fire off
when this happens.
diff --git a/unix/x0vncserver/x0vncserver.cxx b/unix/x0vncserver/x0vncserver.cxx
index 6b5d479..791714e 100644
--- a/unix/x0vncserver/x0vncserver.cxx
+++ b/unix/x0vncserver/x0vncserver.cxx
@@ -593,7 +593,7 @@
       // Process events on existing VNC connections
       for (i = sockets.begin(); i != sockets.end(); i++) {
         if (FD_ISSET((*i)->getFd(), &rfds))
-          server.processSocketEvent(*i);
+          server.processSocketReadEvent(*i);
       }
 
       if (desktop.isRunning() && sched.goodTimeToPoll()) {