Allow identical imports

[Dicebot]

On Tuesday, 30 July 2013 at 14:31:00 UTC, Kenji Hara wrote:
> I think it's a not good compiler implementation detail and 
> unnecessary
> intrusive behavior.
> Now I'm proposing to fix import mechanism in here.
> https://github.com/D-Programming-Language/dmd/pull/2256


That I agree. My comment referred to the opinion that having two 
identical imports in the same scope should not compile anyway, 
whatever the actual reason is.