May I rename some variables?

[Roland Illig <rillig%NetBSD.org@localhost>]

I would like to rename some variables in the bsd.bulk-pkg.mk file to 
make reading the source easier for me. In some of my last mails I have 
already started to introduce (proposals for) variables called 
TOPLEVEL_*. I would like to extend this naming to all other variables 
that specify files to be created directly in ${BULKFILESDIR}.

Currently when reading code that uses ${INDEXFILE} I always have to keep 
in mind that this is an absolute pathname, whereas BROKENFILE, having a 
really similar name is only a basename.

Therefore I want to rename INDEXFILE to TOPLEVEL_INDEXFILE. (Similar for 
some others.)

The change only affects bulk build users that modify these variables in 
their mk.conf. I guess that no one does this, but I want to get some 
affirmation first.

By the way, the bulk build framework is slowly getting into a form that 
motivates me documenting it in the pkgsrc guide. But I first have to 
understand all the other details.

Roland