centos-5.10 add net-tools

[xenoterracide]

ran into a network problem doing yum install net-tools, not sure why the network problem was there, it's rather hard to debug without say ifconfig which is in net-tools. Could you please add this to the image

[juliandunn]

As a workaround I believe you should be able to use ip addr commands. But I will add it back.

[juliandunn]

Upon reflection I think I'm actually going to leave it the way it is, because we'd like to hew close to what the base system provides. But as I said, you can use ip commands in place of what's in net-tools, since that's a more correct/up-to-date way of doing this.