I've decided to remove some confusion from the HAMMER utility, and also

    remove some of the master id code from the filesystem, which was

    designed for multi-master mode but really added confusion to the

    whole master-slave setup since we don't support multi-master mode

    in this release.
    PFS's will now only be master or slave, there will be no master id

    (0-15) setting and there will not be a no-mirror mode.  A single

    whole-mount master id or no-mirror mode can be specified at mount

    time which is how I had it originally.  That way the master_id is

    out of sight and out of mind for the release.
    I am also removing the 'master' and 'slave' options to pfs-update,

    simplifying the PFS features.  Now you can create a master, create a

    slave, upgrade a slave to a master, or downgrade a master to a slave.

    The confusing 'no-mirror', 'master=' and 'slave' options have been

    removed.
    I'll update the hammer.5 and hammer.8 docs appropriately, as well.
						-Matt