After days of wrangling with /etc/wireless, I got it -- almost. One
problem remains. At boot, wlan0 sets up fine, but then dhcpcd fails,
returning that "dhcpcd is already running on wlan0". Once booted, I
must remove /var/run/dhcpcd-wlan0.pid and then run dhcpcd, or manually
run "/etc/init.d/net.wlan0 restart". Either works. I don't know if
the problem is in the wireless or net script or in some shutdown
process. Any advice, pointers, etc. appreciated. Thanks.