[db-wg] re-evaluate route-object authorisation model

>> some folk at euro ixen require route objects in ripe's irr.  some
>> folk who get address space from other rirs appear at those euro ixen
>> and wish to peer.
> 
> ixps which build route server configurations using ixp manager can
> apply arbitrary IRR source tags (or combinations) on a per-customer
> basis.

yes, and peval() and other tools take an IRR instance list.  but i have
enough windmills without tilting at this one.  you wanna peer with
brunhilde, you play by her rules.

when i saddle up rosenantes, it is to get all this to be rpki-based
origin validation instead.

randy