Copy stable/10@r272459 to releng/10.1 as part of
the 10.1-RELEASE process.

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

Copy head (r256279) to stable/10 as part of the 10.0-RELEASE cycle.

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

Fix more typos to be a good example.

Found by: codespell

Add two scripts that demonstrate how to make and
hook together jails using teh vortual networking feature.

Submitted by: Yavuz Gokirmak
MFC after: 2 weeks

Retire /usr/share/examples/netgraph/bluetooth/rc.bluetooth.

MFC after: 1 week

- Correct grammos in comments and end them with full stops.
- Use "if !" instead of empty true branches.
- Don't hardcode script name in usage message, use $0 instead.
- Cleanup some whitespace.

Serial devices now called /dev/cuadXX not /dev/cuaaXX

Replace all uses of the old netgraph constants NG_*LEN by the new
constants NG_*SIZ that include the trailing NUL byte. This change
is mostly mechanical except for the replacement of a couple of snprintf()
and sprintf() calls with strlcpy.

fix typos in comments.
Submitted by: Vincent Jardin <vjardin@wanadoo.fr>

This file just didn't want to commit in the last batch of bluetooth files.
Approved by: re@

Usage style sweep: spell "usage" with a small 'u'.
Also change one case of blatant __progname abuse (several more remain)
This commit does not touch anything in src/{contrib,crypto,gnu}/.

Change the script a bit to allow the creation of 'brouted' bridges.
To do this you need to have each top-end connected as well.
IP can be routed and other protocols get bridged..
Also useful when bridgeing two networks while merging them as
machines will work with both old and new netmasks. (well mostly).

Correct a brain-o in the stats output.

PR: 24839
Submitted by: AMAKAWA Shuhei <amakawa@sf.t.u-tokyo.ac.jp>

Script showing how to setup Ethernet bridging using ng_bridge(4).

Add another netgraph example. This one shows how to set up a simple
UDP tunnel between two subnets.

Add two new generic control messages, NGM_ASCII2BINARY and
NGM_BINARY2ASCII, which convert control messages to ASCII and back.
This allows control messages to be sent and received in ASCII form
using ngctl(8), which makes ngctl a lot more useful.

This also allows all the type-specific debugging code in libnetgraph
to go away -- instead, we just ask the node itself to do the ASCII
translation for us.

Currently, all generic control messages are supported, as well as
messages associated with the following node types: async, cisco,
ksocket, and ppp.

See /usr/share/examples/netgraph/ngctl for an example of using this.

Also give ngctl(8) the ability to print out incoming data and
control messages at any time. Eventually nghook(8) may be subsumed.

Several other misc. bug fixes.

Reviewed by: julian

Add an example of how to run raw IP across a sync port.

Add an example of how to set up a frame relay link using netgraph and
the 'sr' sync card.