bird6: use direct mode for local route exchange

this implies gateway direct mode, but gateway direct mode needs directly connected peers, otherwise an error is thrown
fastd: update encryption and authentication methods
fastd: remove whitespace
Merge pull request #29 from ohrensessel/bird6-update

bird6: use direct mode for local route exchange
Merge pull request #30 from ohrensessel/minor-update-fastd

Minor update fastd