MFC r260261 (gavin):

MFC r260261 (gavin):
Lower the priority of the "connect to any open wireless network" network
description, so guaranteeing that any other defined network will be tried
first.

MFC r260262 (gavin):
Allow bsdinstall to use WPA-Enterprise networks when installing.  This
only allows basic username/password config, and does not provide the
ability to set any of the other WPA options.  Regardless, this is
generally sufficient to associate.

Perhaps in the future this could allow full configuring (e.g. being able
to set "anonymous identity", and perhaps some of the more obscure WPA
options), though perhaps that will better belong in bsdconfig when that
grows wlan config ability.

git-svn-id: svn://svn.freebsd.org/base/stable/10@260682 ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f