Remove $FreeBSD$: two-line .h pattern

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

spdx: The BSD-2-Clause-FreeBSD identifier is obsolete, drop -FreeBSD

The SPDX folks have obsoleted the BSD-2-Clause-FreeBSD identifier. Catch
up to that fact and revert to their recommended match of BSD-2-Clause.

Discussed with: pfg
MFC After: 3 days
Sponsored by: Netflix

various: general adoption of SPDX licensing ID tags.

Mainly focus on files that use BSD 2-Clause license, however the tool I
was using misidentified many licenses so this was mostly a manual - error
prone - task.

The Software Package Data Exchange (SPDX) group provides a specification
to make it easier for automated tools to detect and summarize well known
opensource licenses. We are gradually adopting the specification, noting
that the tags are considered only advisory and do not, in any way,
superceed or replace the license texts.

No functional change intended.

smbmsg: use a more convenient way of accessing data read from a slave

Developers writing code for accessing /dev/smb may use this base utility
as an example. Now that SMB_READB, SMB_READW, SMB_PCALL behave as
documented, wwe can use them in a more convenient way than before.

MFC after: 4 weeks
X-MFC after: r308527

Expand SMBUS API to add smbus_trans() function.

Differential Revision: https://reviews.freebsd.org/D1955
Reviewed by: adrian, jhb, wblock
Approved by: adrian, jhb

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.

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

Fix an off-by-one error in the range check for the maximal -i or -o
block size.

Fix my own style(9) bugs:

. forward declare all static functions
. add a couple of redundant parens in return statements where they've
been missing
. remove the space after exit since it's a function

This is smbmsg(8), a small utility to send/receive SMBus messages.

Also included is a `bus-probe' modus of operation to help scanning
an I2C bus.