Expand EPEL request guide to include details about bugzilla components
    
    It is fairly common for users requesting packages to not understand the
    relationship between package names, source package names, and bugzilla
    components.  This change describes that relationship up front to help
    users complete their request.
    
    This change also separate the bugzilla fields note into two separate
    notes, one for when the component exists in the "Fedora EPEL" product,
    and one for when it doesn't and the bug must be filed against the
    "Fedora" product.