fix references in manual pages to the reference documentation

Update the man page, we don't want M_COPY_PKTHDR, M_MOVE_PKTHDR, MH_ALIGN
and M_ALIGN.

Remove the 'copy' argument from m_devget(), unused. While here rename
off0->off.

branches: 1.64.2;
Clean up, improve a bit, and document m_remove_pkthdr.

Rename the 'flags' and 'nowait' arguments to 'how'. The other BSDs did the
same. Also, in m_defrag, rename 'mold' to 'm'.

New sentence, new line.

M_CLUSTER -> M_EXT_CLUSTER, and remove M_CLUSTER completely.

Improve the documentation of m_copypacket(), to say explicitly that a
header must be present, contrary to m_copym().

While here fix a variable name (from yesterday).

Stop adding '0's in parameter and function names, that's just misleading.
Some remain, they need more investigation.

Remove m_prepend from the man page, it's a helper, and is not supposed to
be part of the API.

Remove m_getclr. It is unused, confusing (vs m_clget), and is a weak
implementation (eg you can't request a zeroed pkthdr mbuf).

branches: 1.56.2;
Improve wording.

m_split does not 'attempt' to restore the chain, it just restores it plain
and simple.

m_prepend does not tolerate being given len > MHLEN, so add a panic, and
document this behavior.

Remove trailing comma from SYNOPSIS.
Try improving markup.

Remove MFREE.

add m_copyup(9) obtained from FreeBSD (manual only)

branches: 1.50.6; 1.50.12;
Remove boilerplate in CODE REFERENCES on file paths.
Describe in intro(9) how to read paths in the CODE REFERENCES section.

.br -> .Pp, the former is not a mdoc(7) macro.

branches: 1.48.4;
No comma is necessary for the last .Nm entry.

branches: 1.47.2;
Convert TNF licenses to new 2 clause variant

branches: 1.46.2; 1.46.4;
update after yamt-lazymbuf merge.

branches: 1.45.8;
kills a few `caddr_t' occurences still present in manpage

running in emulated wizd mode, convert caddr_t to void *.

Bump date for previous.

Let there be no mistake, m_makewritable() does not guarantee that
the writable bytes [off, off+len) are consecutive.

Fix up the description of m_copyback_cow(), which was at best
ambiguous, and at worst, wrong.

document M_MOVE_PKTHDR.

Sort SEE ALSO.

Xref m_tag(9); suggested by Peter Postma for closure of kern/20170.

Add ".An -nosplit" to avoid getting newlines for every .An macro.

Be explicit about which beginning the offset is applied to in m_copydata().

Bump date for mtocl, cltom removal.

remove cltom and mtocl. they've gone away long time ago.

branches: 1.33.2;
New sentence, new line. Zero is no defined value, just a number.

Drop trailing whitespace.

adds a description of m_apply
closes PR kern/26059
has been looked at by Jason Thorpe and Christos Zoulas

mdoc and Grammar improvements (at least I hope so :) ).

- document m_copyback_cow and m_makewritable.
- note limitations of m_copyback.
- bump date.

branches: 1.28.2;
sync with reality and more note. (MEXTADD)

Use
.In header.h
instead of
.Fd #include \*[Lt]header.h\*[Gt]
Much easier to read and write, and supported by groff for ages.
Okayed by ross.

.Nm does not need a dummy argument ("") before punctuation or
for correct formatting of the SYNOPSIS any longer.

The correct capitalisation of 'NetBSD.org' is (you
guessed it) 'NetBSD.org'.

some mdoc fixes.

Fix typos noted by Igor Sobrado in PR misc/19641 (some already fixed
by others):

MCHTYPE(9) - implemntation (implementation)
VFS_CHECKEXP(9) - specied (specified), acces (access)
VOP_ABORTOP(9) - singla (single), implments (implements),
callling (calling), credientials (credentials)

New sentence, new line.

Spelling fixes, from Sergey Svishchev in kern/16650.

Generate <>& symbolically. I'm avoiding .../dist/... directories for now.

Sort sections.

Add missing `size' argument to MEXTADD declaration; from Yannick Montulet
in PR misc/14758.

No point in using __P for prototype declarations in a manual page.

Boring whitespace fixes.

document behavior of M_{LEADING,TRAILING}SPACE when mbuf data portion is shared.
(NOTE: this is a netbsd-only behavior)

wording - refer to [off, off + len] by "the contiguous region", it should
be more clear

document m_pulldown (grammar check anyone?).
document m_pullup length restriction (len <= MHLEN).

Correct mtod() return data type.

Replace a .Xr with a .Pa.

fix up various .Nm abuses:
- keep the case consistent between the actual name and what's referenced.
e.g, if it's `foo', don't use '.Nm Foo' at the start of a sentence.
- remove unnecessary `.Nm foo' after the first occurrence (except for
using `.Nm ""' if there's stuff following, or for the 2nd and so on
occurrences in a SYNOPSIS
- use Sx, Ic, Li, Em, Sq, and Xr as appropriate

document m_dup(9). talk a little bit about issues with shared
external storage (M_EXT).

MLINK2->M_LINK2, also make the listing of these three options be more in
line with the columnar layout.

Don't pass so many args to .Nd macro. It just overflows.

branches: 1.7.6;
More .Os cleanups. .Os is defined in the tmac.doc-common file,
so we shouldn't override it with versions in the manpages. Many more to
come.

Fix formatting errors (bad sentence breaks).

Eliminate extra comma in SEE ALSO section

Add David Brownlee's new intro pages, with editing. (PR #534[23])
Also, while here, expand apparently incorrectly .Dd month abbreviations.
(I thought about doing this in tmac/doc-common...heh...that would have
allowed a possible reverse map back to abbreviations.)

fix capitalization as noted by Chris Demetriou in PR 4377
while I'm here, fix numerous spelling, grammar, and -mdoc macro usage bugs

add missing .Nm calls and MLINKS. from spz@serpens.swb.de

branches: 1.1.2;
Add manual page containing documentation on mbuf management functions and
macros; contributed by S.P.Zeidler <spz@serpens.swb.de>.