Add docs detailing the rollback limitations.

website/source/docs/hyperv/limitations.html.md

@@ -33,3 +33,11 @@ a host only network.
 Vagrant does not implement the `vagrant package` command for Hyper-V
 yet, though this should be fairly straightforward to add in a Vagrant
 release in the near future.
+
+## Snapshots
+
+Restoring snapshot VMs using `vagrant snapshot pop` or 
+`vagrant snapshot restore` will sometimes raise errors when mounting
+SMB shared folders, however these mounts will still work inside the guest.
+
+