changing SHOW_MENU values and maybe name?

[Patrice Dumas]

Hello,

I propose to change the SHOW_MENU possible values to use only strings 
to have something more consistent and logical.  I propose the following change:
0 -> nomenu
1 -> menu

Also, but that may not be so important, SHOW_MENU could be renamed to
something that corresponds more to the new meaning, like FORMAT_MENU.

What do you think?

I can implement the change.

-- 
Pat