Nothing is everything: 用csup更新port tree

Nothing is everything: 用csup更新port tree: "SUPHOST= cvsup.tw.freebsd.org
SUP_UPDATE= yes
SUP= /usr/bin/csup
SUPFLAGS= -g -L 2

SUPFILE= /usr/share/examples/cvsup/stable-supfile
PORTSSUPFILE= /usr/share/examples/cvsup/ports-supfile"