(2.13) monitor: Extend HotAddNic() for advanced features
(2.13) monitor: Extend HotAddNic() for advanced features

In case vhost is enabled we have to pass the vhostfds as returned by
OpenTap() via SCM_RIGHTS prior issuing netdev_add command with vhost
and vhostfds extra arguments.

In case multiqueue is enabled we add the mq and vectors extra
arguments to netdev_add command.

Signed-off-by: Dimitris Aragiorgis <4514117c4a99256e19437c7e3407c4ecbf98aec0@grnet.gr>
Reviewed-by: Hrvoje Ribicic <be5828fca31f89218048bec4189e30a581aa65da@google.com>

apyrgio/snf-ganeti,apyrgio/snf-ganeti