Remove $FreeBSD$: one-line nroff pattern

Remove /^\.\\"\s*\$FreeBSD\$$\n/

Sync with the latest code from OpenBSD.

Approved by: rodrigc (mentor)
Differential Revision: D3550

yppoll(8): Comment out -h option.

The implementation of it is missing (see e.g. NetBSD or OpenBSD). Until
someone works on it, comment out the existing code to silence a warning
about 'hostname' being set but unused.

Found-by: gcc47

Submitted by: Sascha Wildner <swildner@dragonflybsd.org>
Obtained from: DragonFlyBSD (commit e455855db)

A new jail(8) with a configuration file, to replace the work currently done
by /etc/rc.d/jail.

Create the altix project branch. The altix project will add support
for the SGI Altix 350 to FreeBSD/ia64. The hardware used for porting
is a two-module system, consisting of a base compute module and a
CPU expansion module. SGI's NUMAFlex architecture can be an excellent
platform to test CPU affinity and NUMA-aware features in FreeBSD.

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

Obtained from: NetBSD

- Import the HEAD csup code which is the basis for the cvsmode work.

The .Nm utility

yp(4) -> yp(8).

PR: docs/30797

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

$Id$ -> $FreeBSD$

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

Use err(3).

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

Obtained from: NetBSD, slightly modified