Wireguard in OpenVZ with NETIF_F_VIRTUAL feature

[Benedikt Braunger]

Hello Wireguards,

I've been testing wireguard with OpenVZ/Virtuozzo containers [1] which
is based on CentOS and figured out that it is not possible to create a
wireguard net interface within a container. However it is possible to
create it on the host machine and then move it to the containers network
namespace.

I contacted the Virtuozzo Support about this behaviour and they figured
out the reason and released a workaround with a wireguard patch [2]

I have two requests now
* can someone explain me why the `NETIF_F_VIRTUAL` feature is missing in
  [3]? Is this somehow purpose?
* if not, would anything object to merge a patch like this to Wireguard?

Thanks in advance!
Beni

[1] https://de.wikipedia.org/wiki/OpenVZ
[2] https://wiki.openvz.org/VPN_using_Wireguard
[3] https://github.com/WireGuard/WireGuard/blob/master/src/device.c