O: int com_mv@member@(struct command_context *cc);
P: AFS_READ | AFS_WRITE
D: Rename a blob of type @member@.
-U: mv@member@ old_@member@_name new_@member@_name
-H: Rename the blob identified by old_@member@_name to new_@member@_name.
-H: This command fails if new_@member@_name already exists.
+U: mv@member@ source_@member@_name dest_@member@_name
+H: Rename the blob identified by the source blob name to the destination blob
+H: name. The command fails if the source does not exist, or if the destination
+H: already exists.