Re: [PATCH] Use yum's new callback mode when available

[Chris Lumens <clumens redhat com>]

> Detect whether yum supports the new headerless callback mode and
> enable if available, so we save memory if possible but allows
> anaconda to work with any old yum version. Once the new mode is more
> widely available, the cruft for the old mode can hopefully be removed.
> ---
>  pyanaconda/yuminstall.py |   50 +++++++++++++++++++++++++--------------------
>  1 files changed, 28 insertions(+), 22 deletions(-)

I'll push this for master now.  I still need to decide what to do about
f15-branch, though.

- Chris