Copy head (r256279) to stable/10 as part of the 10.0-RELEASE cycle.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

Update ipfilter 4.1.28 --> 5.1.2.

Approved by: glebius (mentor)
BSD Licensed by: Darren Reed <darrenr@reed.wattle.id.au> (author)

* Someone imported a lot of files with the wrong CVS tag, so lots of files need
that fixed in them....
* Keep unnecessary files out of the non-vendor part of this CVS repository.

Committ changes from 3.4.31 -> 3.4.35
* fix bug parsing port comparisons in proxy rules
* make parsing errors in ipf/ipnat return an error rather than return
indicating success.
* make parsing errors in ipf/ipnat return an error rather than return
indicating success.
* make ipfstat work as a set{g,u}id thing - gave up privs before opening
/dev/ipl
* fix ipfstat -A
* make "ipfstat -f" output more informative
* various changes to ipsend for sending packets with ipv4 options
* ipmon was not correctly calculating the length of the IPv6 packet (excluded
ipv6 header length)

MFC: 1 week

remove non-existant references, correct spelling errors.

PR: docs/7963, docs/7790
Submitted by: Stefan Eggers seggers@semyam.dinoco.de
Norihiro Kumagai kuma@jp.freebsd.org

This commit was generated by cvs2svn to compensate for changes in r37074,
which included commits to RCS files with non-trunk default branches.

Import trimmed version of ipfilter 3.2.7.

Obtained from: Darren Reed via http://cheops.anu.edu.au/~avalon/

Import ipfilter 3.2.1 (update from 3.1.8)