releasever in a kickstart

[Chris Lumens]

> 10.10.10.68 - - [05/Nov/2010:17:26:40 +0000] "GET /cfg/c22-fedora.cfg HTTP/1.1" 200 1544 "-" "anaconda/14.22"
> 10.10.10.68 - - [05/Nov/2010:17:26:40 +0000] "GET /linux/fedora/$releasever/$basearch/os//images/updates.img HTTP/1.1" 404 336 "-" "anaconda/14.22"
> 10.10.10.68 - - [05/Nov/2010:17:26:40 +0000] "GET /linux/fedora/$releasever/$basearch/os//images/product.img HTTP/1.1" 404 336 "-" "anaconda/14.22"
> 10.10.10.68 - - [05/Nov/2010:17:26:40 +0000] "GET /linux/fedora/$releasever/$basearch/os//images/install.img HTTP/1.1" 404 336 "-" "anaconda/14.22"

This is probably something we can fix for F15, though that won't help
you much for now.  We're looking into what to do to make this work.

- Chris