Merge branch 'for-3.18' of git://linux-nfs.org/~bfields/linux

Pull two nfsd fixes from Bruce Fields:
 "One regression from the 3.16 xdr rewrite, one an older bug exposed by
  a separate bug in the client's new SEEK code"

* 'for-3.18' of git://linux-nfs.org/~bfields/linux:
  nfsd4: fix crash on unknown operation number
  nfsd4: fix response size estimation for OP_SEQUENCE