ThinkPad support

[isdtor]

I went ahead and upgraded to FreeBSD10/amd64, in fact, I reinstalled
from scratch. This was a mistake. Not only did the upgrade nothing to
fix my problem, but in addition, wireless stopped working. This is
pretty much as described here
http://stackoverflow.com/questions/23103702/oddity-freebsd10-0-wpa-supplicant-pree-shared-keys-fail-networkmanager-linux,
except the NIC is iwn instead of ath.