ok deraadt

- queue packets from pf(4) to a userspace application
- reinject packets from the application into the kernel stack.
The divert socket can be bound to a special "divert port" and will
receive every packet diverted to that port by pf(4).
The pf syntax is pretty simple, e.g.:
pass on em0 inet proto tcp from any to any port 80 divert-packet port 1
A lot of discussion have happened since my last commit that resulted
in many changes and improvements.
I would *really* like to thank everyone who took part in the discussion
especially canacar@ who spotted out which are the limitations of this approach.
OpenBSD divert(4) is meant to be compatible with software running on
top of FreeBSD's divert sockets even though they are pretty different and will
become even more with time.
discusses with many, but mainly reyk@ canacar@ deraadt@ dlg@ claudio@ beck@
tested by reyk@ and myself
ok reyk@ claudio@ beck@
manpage help and ok by jmc@

Update the BSD.x11.dist version to the one in xenocara.

`wsmouse' and `wskbd' without suffixes match the wsmux rule.
Reported by Vadim Zhukov (persgray on gmail)

with the rest of the file.  no functional change.
feedback from sthen@, ok krw@

and filter rules, because we no longer have translation rules.
Pointed out by Mitja Muzenic, ok henning@

OK deraadt@

ok pyr@

have to pass those options.  this makes amd much easier to restart by
hand (though it still remains a nasty daemon do that with)
ok millert

ok deraadt@

ok todd@

attempts to "ifconfig carp down" noticed by david@.
- use non-descriptive variables names rather than $if/$junk to encourage
people reading the code to think what it's doing; many of the output lines
are not interface names.
ok david@

urls with spaces work.  ok sthen@

ok deraadt

Spotted by deraadt@. These were used to bring down carp ifaces
cleanly; replace with shell features.
ok deraadt@, henning@. "Much mo' better" blambert@.

armish, landisk and zaurus. Also fix corresponding .Xr in MAKEDEV.8
ok miod@, todd@

routes are available.  This fixes usage for some OpenVPN users that start
it from hostname.tun*.
Tested by Johan Huldtgren.  ok sthen@, johan@.

to make logging to syslog work with php for example.
ok deraadt@, henning@

for the X protocol instead of port 6000 only; this way pf provides
the same protection level to all X servers.
ok sthen@; "I am convinced that 6000-6010 is acceptable for blocking
in pf" deraadt@, "i'd thought of something similar" oga@

changed with a sysctl, so note it in sysctl.conf. v6 needs further
testing following discussions on the tech mailing list; rainer@ points
out possible interactions with neighbour discovery which need to be
investigated first.
"go ahead on the v4 part" deraadt@

ok miod@