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)

Sometimes, depending on the bpf filter rules used in $PATTERN,
the example script of the manpage feeds awk(1) with values larger
than UINT32_MAX. Then awk prints a negative value, and this
messes up $BPFPROG. Trying to load the resulting bpf byte codes
with ngctl then fails.

For example, the output for PATTERN="udp and dst net 255.255.0.0/16"
should be (all in one line):

bpf_prog_len=10
bpf_prog=[
{ code=40 jt=0 jf=0 k=12 }
{ code=21 jt=7 jf=0 k=34525 }
{ code=21 jt=0 jf=6 k=2048 }
{ code=48 jt=0 jf=0 k=23 }
{ code=21 jt=0 jf=4 k=17 }
{ code=32 jt=0 jf=0 k=30 }
{ code=84 jt=0 jf=0 k=4294901760 }
{ code=21 jt=0 jf=1 k=4294901760 }
{ code=6 jt=0 jf=0 k=8192 }
{ code=6 jt=0 jf=0 k=0 }
]

The two k=4294901760 values are displayed as k=-2147483648 by awk.

Replace the awk script of the manpage example with a slower but
safer version, that doesn't really attempt to convert the byte
code printed by tcpdump from string to number and back.

PR: docs/123255
Submitted by: Eugenio Maffione, eugenio.maffione at telecomitalia.it
MFC after: 3 days

- Sync with ng_bpf.h, rev. 1.7
- Remove extra brace.

Submitted by: Anton Yuzhaninov <citrin rambler-co.ru>

Verify that SYNOPSIS section compiles.

Sort sections.

Mechanically kill hard sentence breaks and double whitespaces.

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.

mdoc(7) police: Use the new .In macro for #include statements.

Removed whitespace at end-of-line; no content changes. I simply did
cd src/share; find man[1-9] -type f|xargs perl -pi -e 's/[ \t]+$//'

BTW, what editors are the culprits? I'm using vim and it shows
me whitespace at EOL in troff files with a thick blue block...

Reviewed by: Silence from cvs diff -b
MFC after: 7 days

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:
setsockopt.3 --> setsockopt.2
syslog.8 --> syslogd.8
tcpdump.8 --> tcpdump.1

MFC after: 1 week

Ensure the generated BPF in the example deliver the whole packet.

Fix typo.

mdoc(7) police: well-known section name is EXAMPLES, not EXAMPLE.

Slight improvement to previous checkin.

Add an example showing how to configure a node from the command line.

Prepare for mdoc(7)NG.

Update @freebsd.org email addresses to @FreeBSD.org as is the
precedent.

Change archie's and my email addresses from Whistle.com to FreeBSD.org

NGM_BPF_{G,S}ET_FILTER should be NGM_BPF_{G,S}ET_PROGRAM.

Move netgraph node type man pages from section 8 to section 4.

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

New netgraph node type, ng_bpf(8). This node type allows you to
apply bpf(4) filters to data travelling through a netgraph network.