Remove $FreeBSD$: one-line sh pattern

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

retire sconfig(8) ce(4)/cp(4) configuration tool

The ce(4) and cp(4) drivers have been retired.

Differential Revision: https://reviews.freebsd.org/D33469

NVME support is only for x86 and powerpc64.

Implement MK_NVME now that the expression for where NVMe is
complicated. Default it to "yes" for x86 and powerpc64 and
no everywhere else. Use it in camcontrol to define WITH_NVME
for those platforms where we support nvme.

This should fix the newly introduced nvme files to camcontrol
which were building everywhere.

Pointy Hat To: imp
Sponsored by: Netflix

Integrate nvmecontrol(8) into the amd64 and i386 builds.

This includes adding NVMe header files to /usr/include/dev/nvme.

Sponsored by: Intel

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

MF tbemd: Move to using Makefile.arch to select what to build.

Reviewed by: arch@ (no objection)