suggested by naddy@.  This solves the problem that occurs when a
server crashes or is hard booted and comes back up without tearing
down any connections to it, and packets from these connections don't
match any existing state or rule and are silenty dropped.
ok phessler@ henning@ claudio@ dlg@

Our dhclient only uses the bpf tap for broadcast packets (which bypass
pf) but lease renewals will use a regular socket and are blocked without
this change.  Rules are written so that accidential forwarding of packets
is not possible.
Diff from brad@, OK henning@, benno@, mikeb@

It was there to try and ensure that failure was reported if nsd stopped
shortly after startup (as it used to do if the address was in use, etc),
but this is no longer the case with nsd 4 which returns a failure at
startup in these cases, and having it there breaks properly printing
"(ok)" when stopping.

ok deraadt@

our processes.
requested by espie@

our processes.
prodded by deraadt@

our processes.
ok tedu

contain both a 2048-byte sector ffs filesystem, and a 512-byte volume header,
so that the IP27 boot magic^Wuglyness recently added to the boot-only cd-rom
(cdXX.iso) can be applied as well.
The full-blown installation iso can now boot on IP27/28/30/32/35.

discussed with rpe and halex

user mode now that init no longer raises securelevel during reboot.
OK deraadt@

- use its return code for single/multiuser detection
ok deraadt

ok deraadt

idea from rpe

unconditionally, and then do the optional powerdown
discussed at length with rpe

ok miod

material

being obtuse and use /dev/random

okay rpe@, kirby@

ok sthen@

into consideration.
Diff from Maurice Janssen, thanks!
ok rpe@ giovanni@

a few developers thought this was a reasonable/good idea.

in /var/run/rc.d/identd has to be manually removed.
Reported by Adam Jeanguenat (avj at voyager dot 6v6 dot org).
ok dcoppa@ lteo@

magic numbers into sgttyb.  The "modern" replacement for f# is the
set of i#, o#, c#, l# to poke magic numbers into termios.
ok miod@

by Bjorn Ketelaars.  Check that the /var/nsd/etc directory is protected
instead, it may contain zone-transfer keys etc.

ok deraadt@

aoyama@

use nsd-control to signal NSD.

ok deraadt@, naddy@, ajacoutot@