Merge pull request #27 from radai-rosenblatt/master

avoid extra copy of data buffer in nfs3.read
pseudofs: do not check READ_ATTR bit for unix

Skip the check, if we ask for ACE4_READ_ATTRIBUTES as unix
always allows it.

Acked-by: Paul Millar
Target: master, 0.9, 0.8, 0.7
allocate and use a single verifier instance instead of creating a new one for every write/commit