Update bos create man page for new naming of demand-attach binaries

Update bos create man page for new naming of demand-attach binaries

The demand-attach fileserver binaries now have a "da" prefix.  Adjust
the documentation in the man page for bos create accordingly, and add
the new binaries to SEE ALSO.

Change-Id: Ib70bad87aaf8bfc483ffbfe402db01c178e6c4e4
Reviewed-on: http://gerrit.openafs.org/2830
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Derrick Brashear <shadow@dementia.org>
Tested-by: Derrick Brashear <shadow@dementia.org>
(cherry picked from commit 82b7327b5ba66c6ddbc898ad383b4e5f2b08ec38)
Reviewed-on: http://gerrit.openafs.org/2845
Reviewed-by: Russ Allbery <rra@stanford.edu>
Tested-by: Russ Allbery <rra@stanford.edu>