mvdic changes the name of the specified user dictionary from from-dic to
to-dic. Dictionary directory file --- dics.dir --- is rewritten
correspondingly to this.
After the changing, the old dictionary name of the customize file must be
deleted.
The dictionary in use (i.e., the currently mounted dictionary) cannot be
deleted.
OPTION
-cs canna-server (or -cannaserver canna-server)
Specifies the name of the server machine that contains the dictionary to
be renamed.