Customers want to use satellite servers as kickstart servers as well.  This is
reasonable.

Unfortunately, RPM duplication and disk space usage becomes a problem.  90% of
the RPMs in a given kickstart file tree will also be in the RPM repository for
the satellite.

To eliminate unnecessary duplication, we should have a de-duping copy function
for RPMs that might work something like this:

$ satcp /mnt/cdrom/filetree/*.rpm /var/www/pub/filetree/*.rpm

Before writing each RPM to disk, satcp would check the satellite repository.  If
an RPM with the same(ish) name and matching MD5sum exists, create a symlink
instead of copying the file.

We would then document the use of this satcp script in the satellite/kickstart
documentation.