vtest memfd
Intended to fix #66 (closed) and #35 (closed).
Note my plan is replace VCMD_TRANSFER_PUT2 / VCMD_TRANSFER_GET2 / VCMD_TRANSFER_RESOURCE_CREATE2 with this, rather than create VCMD_TRANSFER_PUT3 / VCMD_TRANSFER_GET3 / VCMD_TRANSFER_RESOURCE_CREATE3, since I believe this was the original intention behind that and it'll lead to less code.
What does everyone think?
Edited by Gurchetan Singh