ddi-spec: define suggested suffixes, mime types, sector sizes for DDIs

[poettering]

No description provided.

[keszybz]

I think the extension ".raw" is bad. It's too generic: there are simply too many things which are "raw", and different people will have different expectations, and an extension should be unique. OTOH, a DDI is not actually "raw", it has a header with a partition table, so it's a well-defined binary container format. "Raw" would normally be used for file with just contains unadorned data, without a header or other means of understanding the contents. E.g. a "raw file with measurements" could be a file with a bunch of floating-point numbers in binary format. Once you take the exact same data, but wrap a HDF5 header around it, it's not "raw".

[bluca]

Afraid that ship has sailed long ago, as this is now used everywhere

[keszybz]

Nah, not that widely. And actually writing this out made me realize why it extension always seemed wrong.

#89 is a proposal for discussion.