DontSyndicate Pace revised

[Tim Bray <Tim.Bray@xxxxxxx>]

I revised the DontSyndicate Pace in response to Graham's point that the 
attribute isn't just to prevent syndication, it's to prevent the entry 
appearing at the top level of the publication as well as the 
syndication feed.  So the <atom:entry> attribute is now called 
top-level="true|false".

I would point out that as far as I can tell:

(a) the existing type="multipart/alternative" does not provide good 
support for the common use case of a logically-multipart entry
(b) we currently have no other proposal to prevent anything that gets 
sent to the API in an <atom:entry> from showing up in the syndication 
feed or front page of the site

This proposal provides support for posting logically-multipart entries 
that is more or less, I think, the Simplest Thing That Could Possibly 
Work.

People who don't like it ought to propose an alternative 
fully-worked-out proposal that explains:
(a) how the different pieces can refer to each other
(b) how certain pieces are prevented from showing up at the top level 
or in the syndication feed

Alternatively, a good idea is to suggest changes to the DontSyndicate 
proposal, including specific language.

 -Tim