Draft: simple update description guidelines

[Kevin Kofler]

Rahul Sundaram wrote:
> It appears, most maintainers only have been ignoring the description
> fields or not filling them properly because of lack of documentation or
> awareness on how it is being used.

Some of the replies in these threads don't quite suggest that. People
complain about the "bureaucracy" of being "forced" to write such stuff,
which pretty much shows they intentionally do not want to fill in those
fields and won't do it if they can get away without it.

        Kevin Kofler