6783576 ::spa -v should include spares

[eric.schr...@sun.com]

Author: Eric Schrock <Eric.Schrock at Sun.COM>
Repository: /hg/onnv/onnv-gate
Latest revision: 53c5e7987263c97f95f0f44b28c8af249f6c0703
Total changesets: 1
Log message:
6783576 ::spa -v should include spares

Files:
        update: usr/src/cmd/mdb/common/modules/zfs/zfs.c