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spdx: The BSD-2-Clause-FreeBSD identifier is obsolete, drop -FreeBSD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

bluetooth: Remove one more h4 reference.

Sponsored by: Netflix

bluetooth: Remove stray btccc references

The 3com bluetooth PC Card adapter was removed from the tree when PC
Card support was removed earlier this year. Remove stray references to
it still in the tree.

Sponsored by: Netflix

bluetooth(3): Add helper functions that performs Bluetooth Remote Name Request
procedure to obtain the user-friendly name of another Bluetooth unit.

Reviewed by: emax, wblock (docs)
Differential Revision: https://reviews.freebsd.org/D13456

lib: further adoption of SPDX licensing ID tags.

Mainly focus on files that use BSD 2-Clause license, however the tool I
was using mis-identified 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.

Check l2cap socket initialisation and define L2CAP_SOCKET_CHECKED
This will fix build.

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.

Avoid floating point arithmetic while calculating iquiry length.

Submitted by: Iain Hibbert < plunky -at- rya-online -dot- net >
MFC after: 1 week

Implement low-level Bluetooth HCI API.
This should make it easier to make Linux BlueZ libhci port.

Reviewed by: Iain Hibbert < plunky -at- rya-online -dot- net > of NetBSD
MFC after: 1 week
Inspired by: Linux BlueZ
Inspired by: NetBSD

Add Bluetooth compatibility shims. Inspired by Linux BlueZ and NetBSD.

Discussed with: Iain Hibbert plunky -at- rya-online -dot- net of NetBSD
MFC after: 1 month