NULL does not need a cast

Remove unnecessary casts.

Free pt in another error case.
Found by Henning Petersen using cppcheck, in PR 42488.

fix typos

Change all the 'return(x)' to 'return c'.
Makes some other searches I want to do a bit easier.

Overhaul how `build.sh tools' are used:

* Rename "config.h" to "nbtool_config.h" and
HAVE_CONFIG_H to HAVE_NBTOOL_CONFIG_H.
This makes in more obvious in the source when we're using
tools/compat/config.h versus "standard autoconf" config.h

* Consistently move the inclusion of nbtool_config.h to before
<sys/cdefs.h> so that the former can provide __RCSID() (et al),
and there's no need to protect those macros any more.

These changes should make it easier to "tool-ify" a program by adding:
#if HAVE_NBTOOL_CONFIG_H
#include "nbtool_config.h"
#endif
to the top of the source files (for the general case).

Move Keith Muller's code from a 4-clause to a 3-clause licence by removing
the advertising clause. Diffs provided in PR 22397 by Joel Baker, confirmed
to the board by Keith Muller.

Move UCB-licensed code from 4-clause to 3-clause licence.

Patches provided by Joel Baker in PR 22249, verified by myself.

Fix various spelling, grammar, and punctuation problems in comments, from Sergey Svishchev in PR 20164.

branches: 1.15.2;
Protect __RCSID and __COPYRIGHT from being invoked if not defined.

Replace some misuses of "then" with "than".

- ansi KNF (just remove all the #ifndef __STDC__ prototype junk,
leaving the ansi stuff)
- use longlong_t instead of quad_t (etc), and rename *uqd*() -> *ull*()
- clean up the NET2_STAT stuff similar to ftpd; provide #defines and
macros which select which cast to use, etc
- clean up the NET2_FTS and NET2_REGEX #define use

Cleanup and fix typos.
Partially from FreeBSD.

char -> unsigned char cast.

__AUDIT__ cleanup.

Need <time.h> for time(), localtime() and mktime() prototypes.

Allow a century to be specified in time stamps.

branches: 1.7.2;
- Rename local warn so tty_warn that we can include <err.h> since this program
uses err() and errx().
- Fix printf format strings.
- Added WARNS=1; note
- Added missing prototypes.
- Split overloaded trail function into trail() and subtrail().

kill 'register'

convert to new RCS id conventions.

Eliminate uses of some obsolete functions.

Fix up RCS ids.

Add RCS ID's

branches: 1.1.1;
Initial revision

From 4.4 lite

Pull up 1.8 (mycroft)

fix botched pullup from ticket #1021 and make sure this compiles on
non-NetBSD hosts again. Also fixes PR#24481

Pullup rev 1.16-1.19 (requested by rafal in ticket #1021)

Pullup pax to current version on trunk. Includes many fixes.