Note: help and version output are generated by a naïve script which tries a few variants of
<command> --help, <command> -h etc. to find the command's help and version info.
Sometimes it gets lucky, sometimes it doesn't; if the output below looks wrong, it probably is.
lxc-update-config -V (return code: 1)
getopt: unrecognized option '--version'
lxc-update-config --help (return code: 0)
/usr/bin/lxc-update-config -h|--help [-c|--config]
config: the container configuration to update