[w3m-dev 03553] Undo/Redo

* fm.h (Buffer): add undo
	(BufferPos): added
* funcname.tab (REDO): added
		(UNDO): added
* main.c (save_buffer_position): added
	(main): save_buffer_position
	(resetPos): added
	(undoPos): added
	(redoPos): added
* proto.h (undoPos): added
	(redoPos): added
From: Hironori SAKAMOTO <hsaka@mth.biglobe.ne.jp>

funcname.tab

@@ -1,4 +1,4 @@
-# $Id: funcname.tab,v 1.18 2002/12/09 15:51:08 ukai Exp $
+# $Id: funcname.tab,v 1.19 2002/12/10 15:51:14 ukai Exp $
 # macro name	function name
 #----------------------------
 @@@		nulcmd
@@ -105,6 +105,7 @@ PREV_WORD	movLW
 PRINT		svBuf
 QUIT		qquitfm
 READ_SHELL	readsh
+REDO		redoPos
 REDRAW		rdrwSc
 REG_MARK	reMark
 REINIT		reinit
@@ -137,6 +138,7 @@ TAB_LINK	tabA
 TAB_MENU	tabMn
 TAB_MOUSE	tabMs
 TAB_RIGHT	tabR
+UNDO		undoPos
 UP		lup1
 VERSION dispVer
 VIEW		vwSrc