Copy stable/9 to releng/9.3 as part of the 9.3-RELEASE cycle.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

Copy head to stable/9 as part of 9.0-RELEASE release cycle.

Approved by: re (implicit)

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

Add ``enable echo''.

Catch up with PHK's sio(4) cuaa->cuad rework [sys/dev/sio/sio.c rev. 1.456].

Quote authname and authkey. Some ISPs allow (or even require)
non-alphanumeric characters in these and this will be a hint to the
users that quotes can and should be used in such cases.

PR: docs/42292
Submitted by: Matthias Andree <matthias.andree@web.de>
MFC after: 1 week

Remove reference to MAKEDEV

Correct typos, mostly s/ a / an / where appropriate. Some whitespace cleanup,
especially in troff files.

Add an example for testing scalability and concurrency

Add a directory in /var/run to store ppp(8) command sockets.

PR: bin/29966
Approved by: brian
MFC after: 4

Port 139 (NetBIOS session management) is a tcp socket, not udp.

PR: 31215
Submitted by: Stephane Marzloff <secrer@le-bar.org>
MFC after: 1 week

Remove redundant mtu/mru/speed settings

MFC after: 6 days

Fix some typos.

Submitted by: Jimmy Olgeni <olgeni@uli.it>
MFC after: 1 week

Mention that ppp.conf.isdn isn't appropriate for external TAs
Add a section to ppp.conf.sample that is.

MFC after: 3 weeks

Be a little clearer all characters after a # are ignored unless the
# is escaped or quoted. Add an example of # characters as part of
a phone number.

PR: 26605

Make it clear that commands within labels must be indented to be
recognized.

PR: 26293
Reviewed by: brian

Add more comments, fix a typo, mention how to do PPPoUDP using encryption
to create a VPN.

Use an MRU of 1504 with 1500 byte MRRUs

Make the pppoe-in config entry a bit more useful (and verbose)

Mention that some PPPoE servers cache MAC addresses

Show an example of not letting NetBIOS traffic keep the link up

PR: 17865
Submitted by: Glenn Johnson <glennpj@bayouhome.net>

resolf.conf -> resolv.conf; charnier

Add some practical filter examples.

Add protocol to ``nat port'' examples - it's mandatory.

Suggested by: Mark Knight <markk@knigma.org>

The '-' character in chat scripts should only be escaped
twice (since the parsing routines were fixed).

An example of how to configure PPPoE.

Show an example of ``set cd off''

Suggest using just finrst in the dial filter, and not syn.

Submitted by: Ruslan Ermilov <ru@FreeBSD.org>

Show how to prioritize UDP packets

alias -> nat

$Id$ -> $FreeBSD$

Use ``set openmode passive'' in the ssh VPN example

Show how to use the new filter capabilities

Mostly submitted by: Peter Jeremy <jeremyp@gsmx07.alcatel.com.au>

procedure, not proceedure.

Specify the ssh command to use for a VPN inline.

Increase the timeout and wait for ``PPP'' in the compuserve
example.

Submitted by: MALCOLM BOFF <Malcolm_Boff@compuserve.com>

Add some examples of how to throw a window up on your display when
the peer demands authentication, and add some more detail to the
example configurations.

This is the first time I've written any TCL, so I'd appreciate it
if someone eyeballed the *-auth stuff and fixed any glaring problems.

Add ppp example files.