disable binary archive downloads for ports install

[Joshua Root]

On 2013-7-24 04:53 , Clemens Lang wrote:
> On Tue, Jul 23, 2013 at 02:43:14PM -0400, Jeremy Lavergne wrote:
>> If +ucs* is going to impact all binaries built with that python, then
>> they should be subports and not variants. This will allow direct
>> dependencies and conflicts.
> 
> Yes, that would be the ideal solution. However, it is a massive amount
> of work, because it would require going over all python modules and
> finding those that use native code.
> 
> This is another case of variants on language interpreter ports being a
> bad idea. The easiest and imo best solution would be to just remove the
> +ucs4 variant from Python and make it the default (which is what
> happened in python3.3 anyway).

That would break other modules, e.g. pyobjc.

- Josh