Instead of running directly NM with --debug, create a drop-in in
nm-config.sh. This will make sure, that we can get the debug output
regardless the way how NM will be started.
The network-manager command line hook must install a
initqueue/finished hook to ensure that nm-run.sh is executed when
there are network connections to activate.
Fixes: #694
If the root is on network, let nm-initrd-generator create configuration
even if none was explicitly specified on the command line.
Also do the same if /tmp/net.ifaces exists, because the anaconda plugin
creates an empty file in that location in hopes that will make us
configure the network.
Lukas Nykryn