number_pad (modified from <Someone>'s patch)

The number_pad option can now optionally hold a value
{0,1, 2 } for {off, on, DOS-mode} but plain number_pad and
!number_pad in config files still work as before.

When number_pad:2 is set, iflags.num_pad_mode is set to 1
which triggers the following behaviour:
> '5', M('5') and M('0') are mapped in rhack()
>in cmd.c, only when they are entered as a command. When used as a
>number, like in the 'n' command, no mapping takes place. '0' is
>already mapped to 'i' by the core. The
>only difference [<Someone>] left in (deliberately) is when you press Ctrl-0;
>this used to map to C('i'), which is an invalid command; now
>keep it '0' (which is interpreted as 'i' by the core.)

doc/Guidebook.tex

@@ -27,7 +27,7 @@
 \begin{document}
 %
 % input file: guidebook.mn
-% $Revision: 1.64 $ $Date: 2003/04/05 02:14:51 $
+% $Revision: 1.65 $ $Date: 2003/05/12 03:05:00 $
 %
 %.ds h0 "
 %.ds h1 %.ds h2 \%
@@ -40,7 +40,7 @@
 %.au
 \author{Eric S. Raymond\\
 (Extensively edited and expanded for 3.4)}
-\date{May 11, 2003}
+\date{June 5, 2003}
 
 \maketitle
 
@@ -2387,7 +2387,9 @@ in setting this with the `{\tt O}' command.
 Send padding nulls to the terminal (default off).
 %.lp
 \item[\ib{number\_pad}]
-Use the number keys to move instead of {\tt [yuhjklbn]} (default off).
+Use the number keys to move instead of {\tt [yuhjklbn]} (default 0 or off).
+(number\_pad:2 invokes the old DOS behaviour where `{\tt 5}' means `{\tt g}', 
+meta-`{\tt 5}' means `{\tt G}',  and meta-`{\tt 0}' means `{\tt I}'.)
 %.lp
 \item[\ib{objects}]
 Set the characters used to display object classes (default