[oe] Variable reference (was: Documentation update about machine conf files)

[Steffen Sledz]

Holger Hans Peter Freyther wrote:
>> It's a good starting point. But it has one drawback: It allows a short one
>> liner docu only. Often it would be great to have some more info, e.g. a
>> list of supported image file system types for IMAGE_FSTYPES.
> 
> Why do you think so?

When i had a look into conf/documentation.conf it occurred to me that the documentation field may only be a simple string. It seems not to be possible to use e.g. tables or lists there. Sorry, if i'm wrong here.

Steffen