Introduce Wireguard support to bird

[Bjoern Franke]

Hi Janne,

On 07.06.19 20:21, Janne Heß wrote:
> Hey everyone,
> 
> as advertised, I have completed the Wireguard support.
> You might see that I am not really a C expert, but I hope the code is good enough.
> If you need me to change anything or have additional questions, just let me know.
> 

what is the best practice to run bird with OSPF over Wireguard? In my
setup I had to add manually created Link-Local addresses to the
Wireguard interfaces to get OSPF to work.

Best Regards
Bjoern