It is enough if one network interface is online, there is no need to wait for all of them.
Without this, when connecting with Wi-Fi and leaving Ethernet disconnected, the network-online.target will get unnecessarily delayed.
configs/releng/airootfs/etc/systemd/network/20-{ethernet,wirless}.network:
Making sure that systemd-networkd enables DHCP capabilities also for
IPv6 ('DHCP=yes' and unsetting IPv6AcceptRA - see `man 5
systemd.network` for further information).
Closes#23
configs/releng/airootfs/etc/systemd/system/multi-user.target.wants/iwd.service:
Adding a symlink to /usr/lib/systemd/system/iwd.service to enable iwd in
airootfs (and thus on the image).
Closes#18
Adding a numerical prefix ('20-') to the ethernet.network and
wireless.network configuration files for systemd-networkd.
This way overriding them can become more predictable e.g. by providing
files with a '30-' prefix.
Closes#13
configs/releng/airootfs/etc/udev/rules.d/81-dhcpcd.rules:
Removing the udev rule for starting dhcpcd@.service on interfaces of the
form eth* and en*.
configs/releng/airootfs/etc/systemd/network/{ethernet,wireless}.network:
Adding default DHCP configurations for en*, eth*, wlp* and wlan*
interfaces.
configs/releng/airootfs/etc/resolv.conf:
Adding a symlink from /run/systemd/resolve/stub-resolv.conf to
/etc/resolv.conf (in airootfs).
configs/releng/airootfs/root/customize_airootfs.sh:
Adding systemd-networkd and systemd-resolved to the list of services
that are being enabled during airootfs customization.
