polluting ramdisks with devices that aren't needed there.

SMART enabled.
Committing now so that it gets broader testing.
Man page bits will be added once we are confident there is no side
effect and this can stay.
inputs from sthen@ halex@ weerd@
ok deraadt@

requested by krw@
ok halex@

from install.sub
with feedback from and ok halex

tries a bit harder to identify invalid interface names and in
this case emit an error message.
- use [[ $1 == autoboot ]] to avoid a shell error message due to
possible spaces in first argument
- no change in functionality
discussed with krw and halex
ok ("I like this") krw

'stop' then 'start'; so to prevent this daemon from restarting itself,
rc_stop=NO is enough.
ok robert@

so we don't care if the file is present or not; also this function
should never return a failure.
ok halex@

from /etc/rc(8). This prevents the warning to be displayed at shutdown
time when the script has rc_stop=NO.
req. and input from fgsch@
"go ahead" schwarze@
input from an ok halex@, ok robert@

ok halex@

See faq/current.html for more information.
The local_rcconf variable is not used anywhere anymore so drop it.
suggested by deraadt@
ok sthen@

it unconditionally.
The only place local_rcconf could have been defined is from /etc/rc
sourcing rc.conf but then the variable is not exported so it will never
be seen by rc.subr.
ok robert@

actually something to chown/chgrp.
ok todd@

ok dcoppa@, deraadt@

this file, even years after the rc.conf / rc.conf.local split happened.
One way to improve upon this is to put a big fat comment at the top of
the file.  (Other ways to improve this is by renaming files, but that
will just create more confusion).
ok aja robert

the pexp.

ok chl@ gilles@

Pointed out by ajacoutot@

OK claudio@

- add examples for how to accept mail from external source and for a
specific domain

install sample configs to /etc/.
ok claudio deraadt henning mcbride

ok sthen@

ok kettenis@

There is no reason we couldn't reload|stop a daemon even when _flags is
set to NO.
As a bonus side effect, we can now see usage() on disabled scripts.
discussed with sthen@ and espie@
ok sthen@

can trivially regen the <=4k bit ones.  ok djm@

ok deraadt@ robert@

prompted by deraadt@