Remove ISDN4BSD (I4B) from HEAD as it is not MPSAFE and

parts relied on the now removed NET_NEEDS_GIANT.
Most of I4B has been disconnected from the build
since July 2007 in HEAD/RELENG_7.

This is what was removed:
- configuration in /etc/isdn
- examples
- man pages
- kernel configuration
- sys/i4b (drivers, layers, include files)
- user space tools
- i4b support from ppp
- further documentation

Discussed with: rwatson, re

1 files changed, 0 insertions, 111 deletions

diff --git a/usr.sbin/i4b/isdndebug/isdndebug.8 b/usr.sbin/i4b/isdndebug/isdndebug.8
deleted file mode 100644
index 0a9f24c..0000000
--- a/usr.sbin/i4b/isdndebug/isdndebug.8
+++ /dev/null
@@ -1,111 +0,0 @@
-.\"
-.\" Copyright (c) 1997, 2000 Hellmuth Michaelis. All rights reserved.
-.\"
-.\" Redistribution and use in source and binary forms, with or without
-.\" modification, are permitted provided that the following conditions
-.\" are met:
-.\" 1. Redistributions of source code must retain the above copyright
-.\"    notice, this list of conditions and the following disclaimer.
-.\" 2. Redistributions in binary form must reproduce the above copyright
-.\"    notice, this list of conditions and the following disclaimer in the
-.\"    documentation and/or other materials provided with the distribution.
-.\"
-.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
-.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
-.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
-.\" ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
-.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
-.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
-.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
-.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
-.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
-.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
-.\" SUCH DAMAGE.
-.\"
-.\"	$Id: isdndebug.8,v 1.11 2000/05/31 08:15:29 hm Exp $
-.\"
-.\" $FreeBSD$
-.\"
-.\"	last edit-date: [Wed May 31 10:15:07 2000]
-.\"
-.Dd May 31, 2000
-.Dt ISDNDEBUG 8
-.Os
-.Sh NAME
-.Nm isdndebug
-.Nd display and control isdn4bsd kernel variables and statistics
-.Sh SYNOPSIS
-.Nm
-.Op Fl c
-.Op Fl e
-.Op Fl g
-.Op Fl l Ar layer
-.Op Fl m
-.Op Fl q
-.Op Fl r
-.Op Fl s Ar value
-.Op Fl u Ar unit
-.Op Fl z
-.Op Fl C
-.Op Fl Q
-.Sh DESCRIPTION
-The
-.Nm
-utility is part of the isdn4bsd package and is used to control the level of
-debugging output of the isdn4bsd kernel part.
-Every layer of the isdn4bsd kernel uses a debugging mask which can be
-manipulated using this utility.
-.Pp
-A second usage of
-.Nm
-is to display and reset chipset specific statistics and/or error counters
-and to display and reset the D-channel layer 2
-(Q.921 LAPD protocol) statistics and error counters.
-.Pp
-The following options are available:
-.Bl -tag -width Ds
-.It Fl c
-Display chipset specific statistics and/or error counters.
-.It Fl e
-Set debugging mask for the selected layer(s) to display errors only.
-.It Fl g
-Get the debugging mask for the selected layer(s).
-.It Fl l
-Specify the layer for which a command applies.
-Default is all layers.
-.It Fl m
-Set debugging mask for the selected layer(s) to display all possible
-debugging messages (maximum output).
-.It Fl q
-Display the Q.921 (D-channel layer 2) frame receive/transmit statistics.
-.It Fl r
-Set debugging mask for the selected layer(s) to the compiled in default
-(reset).
-.It Fl s
-Set debugging mask for the selected layer(s) to value.
-Value can be
-specified in any number base supported by
-.Xr sscanf 3 .
-.It Fl u
-Set the unit numbers for the -c, -q, -C and -Q flags.
-.It Fl z
-Set debugging mask for the selected layer(s) to no output at all (zero).
-.It Fl H
-Reset the chipset specific statistics and/or error counters to zero.
-.It Fl Q
-Reset the Q.921 (D-channel layer 2) frame receive/transmit statistics to zero.
-.El
-.Sh FILES
-/dev/i4bctl
-.Sh EXAMPLES
-The command:
-.Bd -literal -offset indent
-isdndebug -g
-.Ed
-.Pp
-displays the current debugging level for all ISDN layers
-.Sh AUTHORS
-The
-.Nm
-utility and this manpage were written by
-.An Hellmuth Michaelis Aq hm@kts.org .