This commit adds multi-nameserver support using openresolv (resolvconf)
and dnsmasq. This means that a DHCP client (dhcpcd) or VPN client can
be providers of nameservers to the system. Dnsmasq takes over as the
system resolver, except when the user has set up static configuration.
Static nameserver(s), as well as search and options, are always added
first by openresolv to /etc/resolv.conf.
Signed-off-by: Joachim Wiberg <troglobit@gmail.com>