Hello.

We have the need for mounting CIFS in our build containers. Sadly, Kubernetes doesn't support it natively so we are using FlexVolume (https://github.com/kubernetes/community/blob/master/contributors/devel/flexvolume.md).

Kubernetes-plugin doesn't support it as a volume option as it needs a new PodVolume implementation for it. Ok if I create a PR and add it to the kubernetes-plugin source code?