OpenEmbedded "poky" with some sysmocom specific modifications. Mostly used only up to sysmocom release 201310, but the "pyro" branch is still used for 201705
Rather than parsing the existing XML or standard output of the nfacct
utility, and then piping that into a perl/python script for formatting
to JSON, we teach nfacct to generate JSON directly. This seems like
the proper way to do it. The patches will be submitted mainline.