4943 NFS server: Generic uid and gid remapping for AUTH_SYS
Reviewed by: Jan Kryl <jan.kryl@nexenta.com>
Reviewed by: Dan McDonald <danmcd@omniti.com>
Approved by: Garrett D'Amore <garrett@damore.org>

6344186 NFSv3 needs to support .zfs (like NFSv4 already does)

6257280 assertion triggered in nfs/rpc code