PORTS_MODULES in src.conf: make: don't know how to make instclean. Stop

[Benjamin Kaduk]

On Mon, 2 Jul 2012, David Wolfskill wrote:

> Huh??!?
>
> At least as far back as 06 Jan (based on the mtime of /etc/src.conf), I
> had set up src.conf to read:
>
> PORTS_MODULES=x11/nvidia-driver

"Don't do that."
PORTS_MODULES is documented to belong in make.conf, not src.conf.

That said, dougb has tweaked the behavior of PORTS_MODULES recently, so 
you could look more carefully at those changes. (r237090 and r237958, both 
have been merged back to 7/8/9.)

-Ben Kaduk