New release 1.3.9

Hi Bird users, we have a new version of your popular routing daemon. The major improvement is related to filters. Many thanks to Santiago. Ondrej Version 1.3.9 (2013-01-11) o BIRD can be configured to keep and show filtered routes. o Separate receive and import limits. o Several new reconfiguration cmd options (undo, timeout, check). o Configurable automatic router ID selection. o Dragonfly BSD support. o Fixed OSPFv3 vlinks. o Several minor bugfixes