The showdest command prints the destination for all specified motors in
a scan command.
The syntax for the scandest command is:
showdest 0/1
where 1 will turn the option on and 0 will turn it off.
This command is useful for debugging (where one is concerned with the
detination and physical motor positions being different) and also for
commands where the final position and destination are intentially
different (for instance, if a reciprocal space move is being issued
with one or more motors being held).
