KTar patch to fix speed problems with tar ioslave

[Jan Schäfer]

Hi Alex,

> Well, without the temp file it would be nicer. I didn't look at the
> implementation of the tar/gz/bz2 ioslave.
> What's is actually taking so much time ? (I know, the decompression).
> ioslaves have a "special()" member, which you can use to implement
> non-standard things. 
As far as I understand it, the special member is only for special commands. So 
this would not solve the problem as the problem lies in the standard get 
command.

Jan