Override the parallel make target to use all CPUs.
No need for true here, remove it.

Sponsored by: Netflix
Introduce NANO_PKG_META_BASE to allow moving where metadata for
packages is stored.

Sponsored by: Netflix
Add a routine for easy workaround any umount issues w/o hacking
nanobsd.sh.
Switch to using pkgng for all package management. Add necessary
bootstrap step for pkg. Fix a bunch of annoying little nits. We can
now build fat or thin images successfully for the dhcpd config.
Hoist CR convenience function up from dhcpd config and use
appropriately in nanobsd.sh. Also create CR0 for a errors allowed
version.
Include bsd.opts.mk before Makefile.inc so Makefile.inc can do things
based on MK_xxx symbols. Continue to include bsd.own.mk after
Makefile.inc to preserve current behavior.
Add information about supported NCQ functionality to camcontrol identify.

MFC after:	2 weeks