remove -Werror from userland builds, to give us a chance to
use more verbose warning options if desired.
ok millert@, henning@, david@

open for writing only if needed so, accept multiple var assignments for -w; from meself and Vladimir Popov <jumbo@narod.ru>

$OpenBSD$ tag.

Configuration utility for radio devices.

Work by Vladimir Popov <jumbo@narod.ru>