> 
> The /etc/defaults/rc.pkg.conf would be modified by installation scripts,

Isn't it somewhat saver (if a little more costly in file space)
to have a single file per package.  Scripts editing files
are notoriously difficult to get completely correct.
(especially when deleting items....)

The files could be concatenated to simplify processing.

Clearly (?) only a single file for user parameter changes is required.

	David

-- 
David Laight: david@l8s.co.uk