two important doc fixes: osterm perms and pdc product name
    
    1. When we make a final compose, we make refs for ostree, but the docs
       had it being run as root, this meant that robosignatory couldn't sign
       it and the initial stable compose stalled. We should make it with
       ftpsync user to avoid this.
    
    2. When branching we have been making new fedora as "fedora" product,
       but all the old ones are "Fedora" and lots of things query
       specifically by this, like zodbot's Fedora plugin for new cookies.
       We should just make it as 'Fedora' to start with.
    
    Signed-off-by: Kevin Fenzi <kevin@scrye.com>