On Tue, Mar 12, 2013 at 12:23:10PM -0700, Alexis Metaireau wrote:
> I think adding an example of how to use them in a section could help
> people understand better what this is about.

Ah.  I did something like that in a08138cb821c030f from #671, but that
commit also mentions `EXTRA_PATH_METADATA`.  Is it ok if we leave the
docs as-is until we get to an `EXTRA_PATH_METADATA` pull request?