[K12OSN] Repository update for K12LTSP 4.2.x

[Eric Harrison]

Dan pointed out to me this morning that the K12LTSP 4.2.x (FC3)
repositories were not working properly.

While fixing that bug, I also updated the k12ltsp-release package to
include the Fedora Legacy repositories.

All you should need to do is install the k12ltsp-release package:

	yum install k12ltsp-release

and then do your updates as usual:

	yum update


Fedora Legacy does use a different GPG key, which may cause you
problems. In theory this key should auto-load, but the older versions of
yum are not quite as slick as the latest version when it comes to
auto-installing GPG keys. If you run into problems about a missing key,
you can run this command to fix it:

 	rpm --import /usr/share/doc/k12ltsp/FEDORA-LEGACY-GPG-KEY

-Eric