MFC: r234742

MFC: r234742
It was reported via email that some non-FreeBSD NFS servers
do not include file attributes in the reply to an NFS create RPC
under certain circumstances.
This resulted in a vnode of type VNON that was not usable.
This patch adds an NFS getattr RPC to nfs_create() for this case,
to fix the problem. It was tested by the person that reported
the problem and confirmed to fix this case for their server.

git-svn-id: svn://svn.freebsd.org/base/stable/9@235397 ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f