Added support for a global relative mouse motion option. When true

and on a secondary screen and locked to the screen (via scroll lock)
mouse motion is sent as motion deltas.  When true and scroll lock
is toggled off the mouse is warped to the secondary screen's center
so the server knows where it is.  This option is intended to support
games and other programs that repeatedly warp the mouse to the center
of the screen.  This change adds general and X11 support but not
win32.  The option name is "relativeMouseMoves".

lib/server/CServer.h

@@ -26,8 +26,6 @@
 #include "stdset.h"
 #include "stdvector.h"
 
-class CClientProxy;
-class CClientProxyUnknown;
 class CEventQueueTimer;
 class CPrimaryClient;
 class IClient;
@@ -183,6 +181,9 @@ private:
 	// returns true iff the delay switch timer is started
 	bool				isSwitchWaitStarted() const;
 
+	// stop relative mouse moves
+	void				stopRelativeMoves();
+
 	// send screen options to \c client
 	void				sendOptions(IClient* client) const;
 
@@ -312,6 +313,9 @@ private:
 	bool				m_switchTwoTapArmed;
 	SInt32				m_switchTwoTapZone;
 
+	// relative mouse move option
+	bool				m_relativeMoves;
+
 	static CEvent::Type	s_errorEvent;
 	static CEvent::Type	s_disconnectedEvent;
 };