BIRD 2.13.1 released

Dear BIRD users, we're releasing a bugfix version, 2.13.1. When a case statement in filter had an empty branch, it crashed BIRD. This bug applies to versions 2.13 and 2.0.12. Version 2.0.11 is not affected. Also we fixed a bug in BGP Roles manifesting when the other party sent no capabilities at all. Thanks to Kobayashi_Bairuo <noc@tohunet.com> for reporting. Ondrej