Minor doc error in Handbook

[Robert Brewer]

<http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/portsnap.html>

In the crontab line in A.6.6, pkg_version is passed the flag "I". 
pkg_version in 5.4-RELEASE doesn't have this flag, it looks like it was 
added in 5.4-stable. It would be nice to have a caveat to that effect in 
the docs.

Also, I note in the man page for portsnap when installed from ports (as is 
necessary since it isn't rolled into base until 6.0) suggests using 
portversion instead of pkg_version.
-- 
Robert Brewer
Information Technology Specialist
University of Hawaii at Manoa, Information and Computer Sciences Dept