overlap with the port's config files

unset beforehands; prodded by halex@
Add rc_usage().
ok halex@

clean make build tested on i386;
ok deraadt@, no objections from martynas@

pointed out by sthen@

This basically adds the "rtable %d" keyword to "listen on", "server",
"servers" keywords, to specify which routing table to use.
OK henning@ claudio@ sthen@
manpage reviewed by jmc@

ok deraadt@ robert@

that we can use these scripts right away with /etc/rc.d/XXX -f without
having to manually set _flags.
ok robert@

debug mode.
This commit also adds a force mode for the script to allow one to force
operations even if daemon_flags is set to NO.
In this case the sane default values will be used for each script.
e.g.: "/etc/rc.d/foo -f start" will start sshd even if it's disabled
ok ajacoutot@

disappeared during the source manuals switch.
no objections from schwarze@ jmc@ deraadt@

the forground until we receive a reply or hit the 15 second timeout.
with theo, evolved out of sth completely different

from MERIGHI Marcus <mcmer-openbsd@tor.at>

ok ajacoutot robert

ok henning@, bluhm@

specifically, rewrite them to permit some markup in the column headers,
and use "Ta" instead of literal tabs; mandoc does not currently match groff
100%, but a mandoc fix may be some time off, and we've gone enough releases
with poorly formatting column lists.
in some cases i have rewritten the lists as -tag, where -column made
little sense.

.Bl -column header1 header2 ... <Bl flags>
mixing things up confuses mandoc, and adding flags in can screw up the list.
this hopefully just makes things a bit safer (and more consistent).
(one more bit of work left and all column lists should format how we want)

which is used by (amongst other things) initgroups(3) to set the supplemantary
groups on login.
OK pyr@

lines. Problem noticed by me, this solution from halex@.
ok halex aja

ok sthen@ deraadt@

from sthen@

from david@, okay sthen@ and input from schwarze@

Pointed out by miod@

ok deraadt krw

Use bgpd(8) for this which on a peering router often needs openfiles-cur
to be higher than the default. ok henning@ claudio@ deraadt@

smaller improvements; jmc@ and nicm@ both ask me to get this in because
further tweaking will be easier in-tree

is NULL, and third-party software is starting to rely upon this.
Adapted from FreeBSD via Jona Joachim (jaj ; hcl-club , .lu), with minor
tweaks from nicm@ and yours truly.

pointed out by Moritz Grimm (mgrimm-at-mrsserver-dot-net)

better visual cues as to what's happening. Feedback/ok aja@ schwarze@

sthen@ ok.

feedback from miod@ and deraadt@

jasper@

a section will help people looking for just the MALLOC_OPTIONS.
ok otto@ jmc@

ok krw@

we are beyond the nfs diskless /var and /usr mounting.  Issue also
spotted by Hugo Villeneuve, attempt at repair by me.  Let's see how it
works out in practice...
looked at by krw, too

grep in a NFS diskless environment.  Found and fixed by Hugo Villeneuve