[CFT/RFC]: refactor bsd.prog.mk to understand multiple programs instead of a singular program

[Simon J. Gerraty]

On Sat, 27 Oct 2012 19:53:56 +0100, Chris Rees writes:
>I'm saying that it's unacceptable to expect people to change their
>systems just to make the ports tree work after we have broken it on a
>supposedly supported version.

But there's no suggestion of that.  
The ports tree would take care of itself.

The comment about fixing makefiles refered to the concern about things
outside of base/ports.