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

The last big commit: let usr.sbin/ use WARNS=6 by default.

Sort sections.

Markup and punctuation nits.

style.Makefile(5):
Use WARNS?= instead of WARNS=.

Allow nghook to execute a program with the data socket connected to
stdin and stdout instead of relaying the data. Now it is possible
to say:

nghook -e path: hook /usr/local/bin/foo arg1 arg2

and foo will have the hook to path: at file descriptors 0 and 1.

Add an option to specify control messages to be send to the node before
either executing the program or entering the data relay loop.

add FBSDID, compare getopt() against -1, use fprintf() + exit() in usage()
instead of errx() to get the message starting with "usage:".

Make this WARNS=6 clean by just constifying two local char pointers.

Put all the argument-less options together in the synopsis as required
by style(9).

Implement two command line options that allow one to change the
file descriptors that are used for input and output. That allows
one, for example, to use nghook to bi-directionally pipe the
input and output into/from another non-netgraph-aware program.

The .Nm utility

mdoc(7) police: protect trailing full stops of abbreviations
with a trailing zero-width space: `e.g.\&'.

Use STD{ERR,IN,OUT}_FILENO instead of their numeric values. The
definitions are more readable, and it's possible that they're
more portable to pathalogical platforms.

Submitted by: David Hill <david@phobia.ms>

Perform a major cleanup of the usr.sbin Makefiles.
These are not perfectly in agreement with each other style-wise, but they
are orders of orders of magnitude more consistent style-wise than before.

Remove GCC'isms in CFLAGS.

Remove whitespace at EOL.

mdoc(7) police: removed HISTORY info from the .Os call.

mdoc(7) police: sort SEE ALSO xrefs (sort -b -f +2 -3 +1 -2).

Correct cross-references:
ng_bpf.8 --> ng_bpf.4
ng_ether.8 --> ng_ether.4
ng_iface.8 --> ng_iface.4
ng_pppoe.8 --> ng_pppoe.4
ng_socket.8 --> ng_socket.4
ng_tty.8 --> ng_tty.4
ng_{type}.4 --> /dev/null

MFC after: 1 week

- Backout botched attempt to introduce MANSECT feature.
- MAN[1-9] -> MAN.

Set the default manual section for usr.sbin/ to 8.

mdoc(7) police: removed history info from the .Os FreeBSD call.

Add '-n' flag: don't attempt to read any data from standard input.

Add the '-l' flag to nghook which loops the received data back.

Fix minor typo.

Manual page style work.
Submitted by: Alexey Zelkin <phantom@FreeBSD.org>
thanks!

Remove extra spaces in hex dump output.

Limit COPTS added by Makefile to just '-Wall'.

Put include <netgraph.h> back in - problem was due to a cvsup mess on
freefall. There may also be a real problem w/ buildworld but the fix
would go somewhere else, not here.

Cleanup missing includes, stale includes, and a few printf format
inconsistancies.

Whistle's Netgraph link-layer (sometimes more) networking infrastructure.
Been in production for 3 years now. Gives Instant Frame relay to if_sr
and if_ar drivers, and PPPOE support soon. See:
ftp://ftp.whistle.com/pub/archie/netgraph/index.html
for on-line manual pages.

Reviewed by: Doug Rabson (dfr@freebsd.org)
Obtained from: Whistle CVS tree