Master mk01

in general, I still didn't touch the resize stuff, eth0 must be configured auto by kernel, still before initramfs (if compiled in kernel), if module, udev should hotplug the driver automatically, if not, tell me (kernel parm ip=dhcp (for other variants seek docs))

holded left shift during boot should drop to initramfs shell which allows mods to /boot, so no card removal is needed, or other pc (didn't test with splash which will take over the screen, but line to splash --exit should solve it).

should be able to have root on any by linux supported kernel. extX, btrfs and NFS tested.

/dev, /proc, /sys, /tmp, /run, others are handed over to new root, processes properly handed over (udev, splash ...)