rough method of cleaning the ports tree

[Brent Jones]

> after noticing how large my ports tree grows while compiling, 
> I thought 
> of simply deleting it and do a CVSup to get a new one after the 
> compilation is finished.

I, like many, just use the "portsclean" utility to periodically tidy
things up, or after manual ports builds if you forget to do a "make
clean".  Doing this should keep things in check and keep your ports tree
from growing.

Cheers,
Brent