mpx: SelectEvents and GetEventBase requests.

Some renaming and cleaning up in extinit.c
	MPXLastEvent added

Xi:	ShouldFreeInputMask() from XI is not static any more, used in mpx

dix:	GetPointerEvents() allocates MPX event for MPX devices.
	DeliverDeviceEvents() caters for MPX devices.

include/mpxevents.h

@@ -0,0 +1,19 @@
+/* Copyright 2006 by Peter Hutterer <peter@cs.unisa.edu.au> */
+
+#ifdef HAVE_DIX_CONFIG_H
+#include <dix-config.h>
+#endif
+
+#ifndef MPXEVENTS_H
+#define MPXEVENTS_H 1
+
+#include <X11/X.h>	/* for inputstr.h    */
+#include <X11/Xproto.h>	/* Request macro     */
+#include "inputstr.h"	/* DeviceIntPtr      */
+
+extern int MPXSelectForWindow(
+	WindowPtr              /* pWin */,
+	ClientPtr              /* client */,
+        int                    /* mask */);
+
+#endif

include/mpxextinit.h

@@ -0,0 +1,72 @@
+/* Copyright 2006 by Peter Hutterer <peter@cs.unisa.edu.au> */
+
+/********************************************************************
+ * Interface of mpx/extinit.c
+ */
+
+#ifndef MPXEXTINIT_H
+#define MPXEXTINIT_H
+
+#include "extnsionst.h"
+
+void
+MPXExtensionInit(
+	void
+	);
+
+int
+ProcMPXDispatch (
+	ClientPtr              /* client */
+	);
+
+int
+SProcMPXDispatch(
+	ClientPtr              /* client */
+	);
+
+void
+SReplyMPXDispatch (
+	ClientPtr              /* client */,
+	int                    /* len */,
+	mpxGetExtensionVersionReply *     /* rep */
+	);
+
+void
+SEventMPXDispatch (
+	xEvent *               /* from */,
+	xEvent *               /* to */
+	);
+
+void
+MPXFixExtensionEvents (
+	ExtensionEntry 	*      /* extEntry */
+	);
+
+void
+MPXResetProc(
+	ExtensionEntry *       /* unused */
+	);
+
+Mask
+MPXGetNextExtEventMask (
+	void
+);
+
+void
+MPXSetMaskForExtEvent(
+	Mask                   /* mask */,
+	int                    /* event */
+	);
+
+void
+MPXAllowPropagateSuppress (
+	Mask                   /* mask */
+	);
+
+void
+MPXRestoreExtensionEvents (
+	void
+	);
+#endif
+
+