We need to mount sysfs, so that `ip netns exec` works.
Do that automatically when starting the system container, via rc.local.
While at it, use `podman build --squash-all` to speedup the building of
the container image.
It's between "stop" and "clean". It removes the container,
but keeps the container images. This is to fast restart without
rebuilding the container (image).
Leave a hint about core-dumps.
Also, now we have `contrib/fedora/rpm/configure-for-system.sh` script,
which can configure the build in a way similar to what we get
when doing an RPM build.
That means, inside "contrib/scripts/nm-in-container.sh" we
can just type `make install`, and it will replace the pre-installed
NetworkManager.
The main advantage is that it becomes convenient to run NetworkManager
as a systemd service. Previously, the suggested was to to install
NetworkManager inside another prefix, and run it in the terminal.
Running NetworkManager as systemd service is also necessary for NM-ci,
which restarts the NetworkManager service, and you couldn't run a test,
if you just started NetworkManager in a terminal.
Previously, you had to build a complete RPM, which takes a lot of time.
Yes, it's a large dependency. But on your outer host you
probably configured NetworkManager with QT enabled (for the
example scripts). We want to compile the same work tree inside
the container. So install qt-devel.
It's just convenient to have some tools around, not only
for testing, but also for (some limited) development.
In particular, because we bind-mount .vimrc inside the container, and
if I use vim, black/clang-format is just one key binding away.
It doesn't actually work inside the root-less container...
Well, it works as far as starting to activate, before it
fails. That is still somewhat useful. So have it there...
