Xext: rename Xtst* to XTest*

This patch corrects a misnaming of XTest-related functions.

The extension itself announces itself as XTEST. Xtst is the library name
itself, but all library functions are prefixed by XTest. Same with the
naming in the server.

- Rename all *Xtst* functions to *XTest* for consistency with the library
  and in-server API.
- Rename the "Xtst device" property to "XTEST device" for consistency with
  the extension naming.
- Rename the device naming to "<master device name> XTEST device". The
  default xtest devices become "Virtual core XTEST pointer" and "Virtual
  core XTEST keyboard".

Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>

dix/devices.c

@@ -1200,7 +1200,7 @@ InitValuatorClassDeviceStruct(DeviceIntPtr dev, int numAxes, Atom *labels,
     dev->last.numValuators = numAxes;
 
     if (IsMaster(dev) || /* do not accelerate master or xtest devices */
-        IsXtstDevice(dev, NULL))
+        IsXTestDevice(dev, NULL))
 	InitPointerAccelerationScheme(dev, PtrAccelNoOp);
     else
 	InitPointerAccelerationScheme(dev, PtrAccelDefault);