Modifies defaults which affect file transfers.

  FORMAT:
   SET option

  OPTIONS:
   DEFAULT, MODE, STRU, TYPE

Additional information available:

DEFAULTMODESTRUTYPE

  Sets the default working directory to the specified directory.

  Whenever a remote file specification does not include a directory
  name, the current default directory is merged with the remote
  file name to create a complete file specification.

  FORMAT:
   SET DEFAULT ["]directory_name["]

  EXAMPLE:
   SET DEFAULT "/usr/temp"     ->ULTRIX host

   SET DEFAULT [usr.temp]      ->VMS host

  Mode defines how data is to be transferred.  The only mode
  supported by FTP is STREAM mode.

  FORMAT:
   SET MODE mode-name

  EXAMPLE:
   SET MODE stream

  Structure defines the structure of a file that is to be
  transferred.  FILE structure is the default structure and the only
  structure that is supported.

  FORMAT:
   SET STRU stru-name

  EXAMPLE:
   SET STRU file

   Type defines the data representation type for data transfers.
   Two types of data representation are supported: ASCII and IMAGE.

   ASCII type is the default type.  ASCII type must be selected
   to correctly transfer text files.  IMAGE type must be selected
   to correctly transfer non ascii (binary) files.

  FORMAT:
   SET TYPE type-name

  EXAMPLE:
   SET TYPE ascii