Route prefix aggregation

[Michal Humpula]

Hi,

is it possible to do a route aggregation in BGP or OSPF in current bird? 
I have found only old discussion from 2012, which suggested it's not 
possible. My use case is simple: before exporting routes from internal 
OSPF to external BGP I would like to aggregate them a little bit before 
propagating them to external peer (so he receives only one or two, 
instead of hundreds).

Cheers
Michal