- add option to disable the default user/group in the config file.
If you only want to mount filesystems as root (don't use setuid
root), the default is not very useful. This setting is not
overridable from an external config file, so this needs to be done
here. Perhaps it's possible to tell the package to look in system
/etc, but that makes the install-phase try to put files there too.
Would take quite some patching.
