Just add a stub implementation and let it build. More will be added
later.

Just a handful of unit tests.

This adds LGPL and GFDL texts from the GNU web site and updates the GPL
one:

  COPYING: https://www.gnu.org/licenses/old-licenses/gpl-2.0.txt
  COPYING.LGPL: https://www.gnu.org/licenses/old-licenses/lgpl-2.1.txt
  COPYING.GFDL: https://www.gnu.org/licenses/old-licenses/fdl-1.1.txt

The update to the GPL text is purely cosmetic. However, shipping the
exact same file as GNU publishes may help distros that deduplicate the
license texts or hardlink duplicates.

This adds capability to hand over the network configuration from
OpenFirmware (and potentially other boot loaders with openfirmware
support such as U-Boot) to NetworkManager.

It's done analogously to ACPI/iBFT. In fact, the same ip=ibft command
line option is used, adding a more general ip=fw alias. This probably
deserves some documentation, but I'm not adding any at this time.

https://gitlab.freedesktop.org/NetworkManager/NetworkManager/merge_requests/257

The functionality of the ibft settings plugin is now handled by
nm-initrd-generator. There is no need for it anymore, drop it.

Note that ibft called iscsiadm, which requires CAP_SYS_ADMIN to work
([1]). We really want to drop this capability, so the current solution
of a settings plugin (as it is implemented) is wrong. The solution
instead is nm-initrd-generator.

Also, on Fedora the ibft was disabled and probably on most other
distributions as well. This was only used on RHEL.

[1] https://bugzilla.redhat.com/show_bug.cgi?id=1371201#c7

For the most part, we only have one main .gitignore file.

There were a few nested files, merge them into the main file.

I find it better to have only one gitignore file, otherwise the
list of ignored files is spread out through the working directory.

We already have 4 other tests that are named "test-general". Rename.