Patch to allow specifying a compressor when running livecd-creator

[Bruno Wolff III]

I have attached a patch that allows specifying a compressor to use when
running livecd-creator.

I'd like some review to make sure it looks sane.

Assuming it looks good, I'd like to see it get into rawhide soon as either
an update to 031 or as 032.

I made the patch versus the head of the master branch, but it applied
cleanly to the 031 source from the F13 srpm.

I have done some testing and it seems to work reasonably and images using
zlib boot. (Images using lzma can be looked at for size, but won't boot.)
By getting it into rawhide now we can make sure the fallback after making
lzma the default is just making zlib the default again. (Just to be clear,
zlib is the default with this patch.)

[Bruno Wolff III]

On Sun, Jun 13, 2010 at 23:53:10 -0500,
  Bruno Wolff III <bruno(a)wolff.to&gt; wrote:
>  I have attached a patch that allows specifying a compressor to use
> when
>  running livecd-creator.
>  
>  I'd like some review to make sure it looks sane. 
I now have access to commit this to master, but would like someone to ack
that the style and changes seem reasonable before doing so.
Thanks.