First working draft of the zfs-snap-send script.
Please read it through carefully before you attempt to use it.
Careless use may cause files to be overwritten.
Created snap_send function to handle the actual push of streams.
Corrected pattern match against Initial snapshots.
Changed order between the send and receive mbuffer jobs.  We now
send in the background and receive in the foreground.
Enabled the zfs-auto-snap timestamp update.