[cpplib doc patch] Do not create filenames beginning with a -

[Neil Booth]

Phil Edwards wrote:-

> The current manual, depending on the options passed to makeinfo, creates
> a file named "-MF.html" and we can all see where that leads.  This renames
> the reference while preserving the visible output text.  Suggestions
> welcome for a better name than dashMF.
> 
> 
> 2003-09-28  Phil Edwards  <phil@codesourcery.com>
> 
> 	* doc/cppopts.texi:  Use 'dashMP' instead of '-MP' as a cross-
> 	reference name.

OK, if you've not already applied it.

Neil.