reduce priority of large port builds, e.g. firefox, gcc4x

[Anton Shterenlikht]

	From owner-freebsd-questions at freebsd.org Wed Aug 29 16:52:53 2012

	> Is it possible to reduce priority
	> of port building processes with
	> something like "nice +19 make" (tcsh syntax)?

	Sure, I do it all the time.

ok, thanks.
I'll try it next time.

Anton