Because at least the --mode default value may not be expected, the
manual lists the "default values". As they are not explicitly set in the
`__file` type, it is a bit more difficult, but should resolve to
following:
- the mode comes from the umask set in the cdist code to protect file
creation and uses the strongest umask possible.
- the owner and group comes from the ssh user, which should always be
the root user. (I think this can be swaped, too, but who will?)
At the owner and group parameter, it could be replaced with something
like "the ssh user and group", which would be more correct, but less
understandable.