of /libdata/firmware and /usr/libdata/firmware are not installed
if set to "no". from the bsd.README:
MKFIRMWARE If "no", install the /libdata/firmware directory,
which is necessary for several drivers: athn(4), bwfm(4),
ipw(4), iwi(4), iwm(4), iwn(4), otus(4), rtwn(4), urtwn(4),
wpi(4), ral(4), rum(4), run(4), zyd(4), bcm43xx(4), and
the Tegra 124 SoC.
Default: yes on amd64, cobalt, evbarm evbmips, evbppc, hpcarm,
hppa, i386, mac68k, macppc, sandpoint, and sparc64, no elsewhere.
convert MKRADEONFIRMWARE and MKTEGRAFIRMWARE into FOO.arch lists,
and move their defaults above the general defaults setting.
saves about 12MB in a normal installation for other platforms.
adapt the urtwn(4) driver to use the new files. The firmware files were
extracted from the Linux driver at www.realtek.com, version 0005.1230.2011
and the license permits redistribution without modification.
While I'm here, install the files in /libdata/firmware/if_urtwn, like
most of the other network adapter firmware.
urtwn(4) can now operate without needing external files installed. Tested
on my Edimax adapter.