bump posix spec 2008 -> 2024;

no change noted from 2008 spec, but i've added -h to the list
of extensions. that was an omission from our 2008 notes,
rather than a change in the spec.

More correction of section 3 layout. directory->opendir, fts->fts_open,
getcap->cgetent. pwcache->user_from_uid. And then repair references.
ok jmc

X is not restricted to just the + operator;

diff from klemens nanni
confirmed by otto

Document the -h option for chmod and chflags, rewording the chgrp(1) and
chown(8) manpages to be consistent and clearer about it as well.

remove the first comma from constructs like ", and," and ", or,": you can use
"and" and "or" to join sentence clauses, and you can use commas, but both hinders
reading;

Correct the handling of symbolic links by chmod/chgrp/chown/chflags,
making them more resistant to TOCTOU race conditions too.

ok tobias@

sticky bit is marked xsi;

- remove brackets in -H description: the information is quite relevant
- note that not following sym links is default for -R
- improve the description of -R, providing a mnemonic and a simpler
descri

- remove brackets in -H description: the information is quite relevant
- note that not following sym links is default for -R
- improve the description of -R, providing a mnemonic and a simpler
description of what it does. also make the text for all these pages
identical, as far as is possible

ok millert schwarze

show more ...

ellipsis is not an optional argument; replace ".Ar file ..." -> ".Ar";
simplify the symbolic modes format.

ok (and fine-tuned by) jmc@, millert@

add an EXIT STATUS section for /bin;

bump the posix reference in STANDARDS to IEEE Std 1003.1-2008, with a few
updates to follow;

replace hardcoded exit values with .Ex macros;

ok jmc@

convert to new .Dd format;

- consistent STANDARDS blurb
- note which options are extensions to POSIX

discussed w/ deraadt otto millert

`t' and `X' are now included in posix spec;
bump the revision for the latest posix spec;

problem reported by jonathan glaschke;
ok millert

standardise EXAMPLES;

- fix SYNOPSIS blip
- put description of -R in the right place
- remove unneeded .Pp

remove some unneeded .Fl's;

Remove the advertising clause in the UCB license which Berkeley
rescinded 22 July 1999. Proofed by myself and Theo.

Undo a misguided attempt to fix speling errors from long ago. UCB
copyrights say "acknowledgement", not "acknowledgment". You cannot
just go changing the text of a license willy-nilly.

more .Li

Initial patch.
When you give command examples in a manual page prefix them with
$ command
or
# command

deraadt@ ok

Fix confusing formatting of an example.

Use better grammar.

Add some rudimentary EXAMPLES sections and standardize the way we display
existing EXAMPLES sections.