Bird 1.5.0: protocol 'direct' looses routes

[Andrew]

Hi all.

I'm testing bird 1.5.0 on PPPoE BRAS, and today noticed that sometimes 
it looses routes. For ex., today it looses near 5 networks of 103 total 
(before restart - it has 98 routes, after - 103)

Possibly this may be related with tunnel session hangup - when user 
reconnects with same IP and then old session is dropped, bird may loose 
this route while route is present in system. But I'm not sure about this.