rpm has too many ways to load configuration goop.

That mostly can't be helped, and is mired in hysterical legacy concrete.

Meanwhile, I find Yet More Ways of configuration being added under
RPM_VENDOR_OPENPKG and RPM_VENDOR_WINDRIVER. While
that's perfectly OKAY with me, it does have a hidden cost:

     Its bloody impossible to write and maintain a standalone "make  
check" with
     all this variation.

Can we try to cook all the paths down to simpler and more predictable?

Note that I have both re-adding %{rpmhome} (to handle  
rpm-4.5.90.89.88... compat)
as well as run-time configuration path discovery to somehow merge into
rpm Real Soon Now.

See lib/poptALL.c for much of the variance ...

73 de Jeff