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 NetBSD Foundation has given permission to remove clause 3 and 4
from their liceense.

Obtained from: NetBSD

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

Include <timeconv.h> for time conversion functions.

Approved by: das (mentor)

Use __FBSDID over rcsid[]. Protect copyright[] where needed.

The .Nm utility

ANSIfy and remove some dead code.

Sponsored by: DARPA, NAI Labs

Apply the following mechanical transformations in preparation for
ansification and constification:

s{\s+__P\((\(.*?\))\)}{$1}g;
s{\(\s+}{\(}g;
s{\s+\)}{\)}g;
s{\s+,}{,}g;
s{(\s+)(for|if|switch|while)\(}{$1$2 \(}g;
s{return ([^\(].*?);}{return ($1);}g;
s{([\w\)])([!=+/\*-]?=)([\w\(+-])}{$1 $2 $3}g;
s{\s+$}{\n};g

Also add $FreeBSD$ where needed.

MFC after: 1 week

I've been meaning to do this for a while. Add an underscore to the
time_to_xxx() and xxx_to_time() functions. e.g. _time_to_xxx()
instead of time_to_xxx(), to make it more obvious that these are
stopgap functions & placemarkers and not meant to create a defacto
standard. They will eventually be replaced when a real standard
comes out of committee.

yp(4) -> yp(8).

PR: docs/30797

Fix int vs time_t, convert int to time_t

Include missing header files which define functions for which gcc has
builtints (e.g., exit, strcmp).

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

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

mdoc(7) police: use the new features of the Nm macro.

$Id$ -> $FreeBSD$

Two getopts related nits:
o getopt returns -1 rather than EOF on errors
o getopt returns '?' for characters it doesn't know about, so
don't include them in the getopt options string.

.Sh AUTHOR -> .Sh AUTHORS. Use .An/.Aq.

Use err(3).

Add ypwhich(1) and yppoll(8) manual pages.

Obtained from: NetBSD, slightly modified

Revert $FreeBSD$ to $Id$

Make the long-awaited change from $Id$ to $FreeBSD$

This will make a number of things easier in the future, as well as (finally!)
avoiding the Id-smashing problem which has plagued developers for so long.

Boy, I'm glad we're not using sup anymore. This update would have been
insane otherwise.

Remove trailing whitespace.

Added YP section 8 programs from 1.1.5. (Obligatory notice that this
code was originally written by Th. de Raadt, although this particular
organization is mine.)