paul 217aacd059 Only flush rules that have a rule number above that set by a new
sysctl, net.inet.ip.fw.permanent_rules.

This allows you to install rules that are persistent across flushes,
which is very useful if you want a default set of rules that
maintains your access to remote machines while you're reconfiguring
the other rules.

Reviewed by:	Mark Murray <markm@FreeBSD.org>
2001-03-21 08:19:31 +00:00
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