[dmd-internals] Patch list #1 for DMD2.041

[Trass3r]

> ok, these are done. Thanks, Don!
>
> Don Clugston wrote:
>> The patches below all seem to be ready for inclusion in the next
>> compiler release. They're not too complicated.
>>

This patch is also quite simple and could be integrated:  
http://d.puremagic.com/issues/show_bug.cgi?id=2997
(if the usecase I've given there is valid)

In fact it only adds parsing the interface members but since it must be  
done recursively it's put into a helper function.