[horde] iOS Mail Spam support

[Twilek]

> There was a bug in our code that caused an exception to be thrown  
> when=20= >=20 >subscribing=20to the Junk folder after attempting to  
> create it, if it=20=20 >already=20existed. I've fixed this and  
> released a new ActiveSync package. > >Not 100% sure this is  
> _everything_ that is causing issues with the=20=20 >Junk=20folder,  
> but it will get you past the errors that are being thrown=20= >=20  
> >in=20your sync log and causing the hierarchy to be resynchronized.   
> Thanks Mike,  that seemed to have worked wonders. Ios Mail will now  
> move the mails to the Spam Folder without complaining!