While working on CR 6359212, I found out that kernel RPC has got no AUTH_NONE implementation. Most of the NFS client implementations send AUTH_SYS
for AUTH_NONE mounts. For better interoperability, NFS servers accept AUTH_SYS for
AUTH_NONE mounts and map the request to anonymous user. It is good if the NFS client
can indeed send AUTH_NONE requests for AUTH_NONE mounts.