Setup dhcp for all en* network interface, when systemd-networkd.
This allows us to abandon the use of udev-rule-generator-net.

Request by arbars@

Needed for booting in UEFI mode on single-board computers with U-boot.

dtb is needed for bootloading iso with u-boot.

Need for file dialogs.

The package will most likely not be assembled in Sisyphus and
branches. Wallpaper will most likely be in branding.

Package removed from Sisyphus, p11, p10, p9.

This reverts commit 706afd16.

Dead upstream.

Only megapixels works on pinephone.
gnome-camera works on other devices.

For added to initrd.mk.oem before make-initrd.

Now startup is not added to images with systemd.

This is necessary so that build image with other network subsystem only.

For build desktop Regular's without etcnet.

installer-common-stage3 contain scripts for setup etcnet.
We remove etcnet from the installer to make it possible to build
images without it.