multimaster implementation (such as vendor specific masters)

[Greg Swift]

So.. here is a discussion from the IRC channel about a different use
case.  I don't know how likely it is, but it seems like something that
would be attractive to vendors.

Also seems like the ability for a local katello instance to be able to
attach to multiple upstream katello's in the same was as I describe
for the customers in the discussion.

-greg/xaeth