Unfortunately, there is a bug in lgi library causing the incorrect values
being returned and the example crashes. I am going to send a patch to lgi
to fix the issues.

[libnm]     https://developer.gnome.org/libnm/1.0/
[lgi]       https://github.com/pavouk/lgi
[lgi-guide] https://github.com/pavouk/lgi/blob/master/docs/guide.md

On most distribution just install lua-lgi.

Note:
There is a bug in lgi. It doesn't handle GPtrArray corectly. It results in
crashing on list-devices.lua and list-connections.lua.
I will send a patch to lgi to fix the issue.

Routing table entries for a device get flushed when the device is
deactivated, but rules table entries don't, so we have to flush them
by hand.

If a connection has an associated "rule-NAME" or "rule6-NAME" file,
don't try to read in the routes, since NetworkManager won't be able to
parse them correctly. Instead, log a warning that they will need to be
applied via a dispatcher script, and provide a script that would do
that in examples/dispatcher/.

Update the raw D-Bus python examples to use newer APIs where
appropriate (and split the add-connection example into 1.0-only and
0.9-compatible versions). Update the gi-based python examples for the
various API changes since they were last updated.

Also add a comment to the ruby add-connection example pointing out
that it's still using the old settings APIs.

config.h should be included from every .c file, and it should be
included before any other include. Fix that.

(As a side effect of how I did this, this also changes us to
consistently use "config.h" rather than <config.h>. To the extent that
it matters [which is not much], quotes are more correct anyway, since
we're talking about a file in our own build tree, not a system
include.)

Split a base NMSettingIPConfig class out of NMSettingIP4Config and
NMSettingIP6Config, and update things accordingly.

Further simplifications of now-redundant IPv4-vs-IPv6 code are
possible, and should happen in the future.