Remove $FreeBSD$: one-line sh pattern

Remove /^\s*#[#!]?\s*\$FreeBSD\$.*$\n/

Use SRCTOP-relative paths to other directories instead of .CURDIR-relative ones

The SRCTOP conversion simplifies pathing in make/displayed output.

Also, while here, change a hardcoded path to ar5523.bin.uu in the make target
with ${.ALLSRC} .

MFC after: 1 week
Sponsored by: Dell EMC Isilon

Just install ar5523.bin into /usr/share/firmware and stop compiling it
in.

Differential Review: https://reviews.freebsd.org/D5639

Document why we use -z nonexecstack in the Makefile since it
is so unusual. Turn off mis-match warnings for building uathload
because the firmware .o file is produced in a way that we
can't get to match exactly. This fixes the build on mips,
so stop excluding it from the build.

Only use -z noexecstack for these explicit arches: i386, amd64, powerpc
and powerpc64. Other arches currently do not support this feature.

Reminded by: kib

Fix the last binary in the base system that still has an executable
stack, /usr/sbin/uathload.

Since this program links in a .o file containing a firmware blob, and
there is no clean way to add a .note.GNU-stack section to this .o file,
we simply use the -z noexecstack option to ld here.

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

add uathload.8

Reviewed by: brueffer

Add uath(4) wireless USB driver for Atheros AR5005UG and AR5005UX
chipsets.

Reviewed by: sam