This adds functions for encoding and decoding POSIX ACLs for the NFSACL
protocol extension, and the GETACL and SETACL RPCs. The implementation is
compatible with NFSACL in Solaris.
Signed-off-by: Andreas Gruenbacher
Acked-by: Olaf Kirch
Signed-off-by: Andrew Morton
Signed-off-by: Trond Myklebust