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Document -v in ifstated.8 and usage() and use __progname in usage().

Fix from merith at redmoon dot openbsd dot de, with slightly modified wording.

.\" $OpenBSD: ifstated.8,v 1.3 2004/03/07 08:49:05 mcbride Exp $
.\"
.\" Copyright (c) 2004 Ryan McBride <mcbride@openbsd.org>
.\"
.\" Permission to use, copy, modify, and distribute this software for any
.\" purpose with or without fee is hereby granted, provided that the above
.\" copyright notice and this permission notice appear in all copies.
.\"
.\" THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
.\" WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
.\" MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
.\" ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
.\" WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
.\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
.\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
.\"
.Dd February 4, 2004
.Dt IFSTATED 8
.Os
.Sh NAME
.Nm ifstated
.Nd "Interface State daemon"
.Sh SYNOPSIS
.Nm ifstated
.Bk -words
.Op Fl dhinv
.Op Fl D Ar macro=value
.Op Fl f Ar file
.Ek
.Sh DESCRIPTION
The
.Nm
daemon runs commands in response to network state changes which it
determines by monitoring interface link state or running external
tests.
For example, it can be used with
.Xr carp 4
to change running services or to ensure that
.Xr carp 4
interfaces stay in sync, or with
.Xr pf 4
to test server or link availability and modify translation or routing rules.
The options are as follows:
.Bl -tag -width Ds
.It Fl D Ar macro=value
Define
.Ar macro
to be set to
.Ar value
on the command line.
Overrides the definition of
.Ar macro
in the configuration file.
.It Fl d
Do not daemonize and log to
.Em stdout .
.It Fl f Ar file
Specify an alternate location,
.Ar file ,
for the configuration file.
.It Fl h
Print help message.
.It Fl i
Ignore initial interface states.
.It Fl n
Config test mode.
Check config validity, then exit.
.It Fl v
Verbose mode. Use twice to further increase verbosity.
.El
.Sh FILES
.Bl -tag -width "/etc/ifstated.conf" -compact
.It Pa /etc/ifstated.conf
.Nm
configuration file.
.El
.Sh SEE ALSO
.Xr carp 4 ,
.Xr pf 4
.Sh HISTORY
The
.Nm
program first appeared in
.Ox 3.5 .