Make 'permission' the default bind type for managed permissions
    
    This reduces typing (or copy/pasting), and draws a bit of attention
    to any non-default privileges (currently 'any' or 'anonymous').
    
    Leaving the bindtype out by mistake isn't dangerous: by default
    a permission is not granted to anyone, since it is not included in
    any priviliges.
    
    Reviewed-By: Martin Kosek <mkosek@redhat.com>