build: Don't conditionally omit files from distribution
tests: Don't run session-long dbus daemons for tests

They require a tty or X11 displays, thus are not suitable for headless runs
(such as in mock). Furthermore, they die with the tty or X11 session, which
is somehow late -- a lot of them may accumulate. Let's kill them right away.
contrib/rpm: Run make check
contrib/rpm: Use bconds
Merge remote-tracking branches 'lr/lr-unmanaged-slaves', 'lr/lr-ipv6-tokens', 'lr/lr-ap', 'lr/lr-rdisc-mtu', 'lr/lr-rpm', 'lr/lr-lxc', 'lr/lr-hostname' and 'lr/lr-bond-activation' into integration