enh: patch for extra NoCursor option

[Erik Devriendt]

In older versions of Vvnc there was an option to switch off the display of the mouse cursor. This option was useful when
using Xvnc to provide a view-only image.
This option is not present anymore in the current version of Xvnc.

Here follows a patch that reimplements that option. Feel free to include it in subsequent versions of Xvnc.
The new option is called 'NoCursor'. The change consists of only 6 lines.

Many thanks.

File vnc4-4.1.1+xorg1.0.2/unix/xc/programs/Xserver/vnc:

--- XserverDesktop.cc.orig 2009-05-06 15:50:03.000000000 +0200
+++ XserverDesktop.cc 2009-05-05 19:10:07.000000000 +0200
@@ -72,6 +72,9 @@
                                  "rejecting the connection",
                                  10);

+BoolParameter noCursor("NoCursor",
+ "Don't put up a cursor", false);
+
 static KeyCode KeysymToKeycode(KeySymsPtr keymap, KeySym ks, int* col);

 static rdr::U8 reverseBits[] = {
@@ -343,6 +346,9 @@

 void XserverDesktop::setCursor(CursorPtr cursor)
 {
+ if(noCursor)
+ return;
+
   try {
     int w = cursor->bits->width;
     int h = cursor->bits->height;