Remove $FreeBSD$: two-line .h pattern

Remove /^\s*\*\n \*\s+\$FreeBSD\$$\n/

- Replace N(a)/N(i)/N(T)/LEN(a)/ARRAY_SIZE(a) with nitems()
- Add missing <err.h> for err() and <sys/sysctl.h> for sysctlbyname()
- NULL -> 0 for 5th parameter of sysctlbyname()

Submitted by: Andriy Voskoboinyk <s3erios@gmail com>
Differential Revision: https://reviews.freebsd.org/D3442

Bump this up - that way the AR9300 and later MACs get covered (for now)
by the AR5416 register map.

Add AR_ISR_S5 and AR_ISR_S5_S.

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

Dump the AR_PHY_TURBO register on the AR5416. This register holds 11n
configurations.

Sponsored by: iXsystems, inc.

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.

add more register bit defs

move shared register support code to common