dtfile: Add missing prototypes

Add missing prototypes and header files to the dtfile
code in order to move closer towards 64-bit compatibility.

Extract the following functions from Motif internal headers:

_XmGetWidgetExtData
_XmRecordEvent
_XmStringUngenerate
_XmTextFieldSetDestination
_XmGetActiveTopLevelMenu

Extract manually prototypes of the obsolete Motif interface:
_XmHighlightBorder
_XmUnhighlightBorder

Remove XmPrivate.h if extractprototype.awk fails

Make the following header files available via -I:
	codelibs/boolean.h
	codelibs/pathutils.h
	codelibs/shellutils.h
and remove shellutils.h from dtwm directory.

cde/programs/dtwm/Dt/shellutils.h

@@ -1,56 +0,0 @@
-/*
- * CDE - Common Desktop Environment
- *
- * Copyright (c) 1993-2012, The Open Group. All rights reserved.
- *
- * These libraries and programs are free software; you can
- * redistribute them and/or modify them under the terms of the GNU
- * Lesser General Public License as published by the Free Software
- * Foundation; either version 2 of the License, or (at your option)
- * any later version.
- *
- * These libraries and programs are distributed in the hope that
- * they will be useful, but WITHOUT ANY WARRANTY; without even the
- * implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
- * PURPOSE. See the GNU Lesser General Public License for more
- * details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with these librararies and programs; if not, write
- * to the Free Software Foundation, Inc., 51 Franklin Street, Fifth
- * Floor, Boston, MA 02110-1301 USA
- */
-/*
- * File:	shellutils.h $XConsortium: shellutils.h /main/3 1995/10/26 16:13:31 rswiston $
- *
- * (c) Copyright 1993, 1994 Hewlett-Packard Company
- * (c) Copyright 1993, 1994 International Business Machines Corp.
- * (c) Copyright 1993, 1994 Sun Microsystems, Inc.
- * (c) Copyright 1993, 1994 Novell, Inc.
- */
-
-#ifndef __SHELLUTILS_H_
-#define __SHELLUTILS_H_
-
-#ifdef __cplusplus
-extern "C"
-{
-    char const *const *shellscan(char const *str, int *argc = (int *)0,
-	    unsigned opts = 0);
-}
-#else
-    extern char **shellscan();
-#endif
-
-#define SHX_NOGLOB	0x0001
-#define SHX_NOTILDE	0x0002
-#define SHX_NOVARS	0x0004
-#define SHX_NOQUOTES	0x0008
-#define SHX_NOSPACE	0x0010
-#define SHX_NOMETA 	0x0020
-#define SHX_NOCMD	0x0040
-#define SHX_COMPLETE	0x0080
-
-#define SHX_NOGRAVE	0x0040		/* Obsolete, use NOCMD */
-
-#endif /* __SHELLUTILS_H_ */

cde/programs/dtwm/WmResParse.c

@@ -61,7 +61,7 @@ static char rcsid[] = "$XConsortium: WmResParse.c /main/9 1996/11/01 10:17:34 dr
 #endif /* PANELIST */
 #include "WmResource.h"
 
-#include "Dt/shellutils.h"     /* shellscan */
+#include <codelibs/shellutils.h>    /* shellscan */
 
 #include <Xm/VirtKeysP.h>
 #include <Xm/XmPrivate.h>      /* _XmVirtKeysLoadFileBindings,