This command executes the Searchlight file transfer system, a subsystem
that can be used to send and receive files to/from the bbs. The files
system provides many subcommands and has it's own Help facility which can
be used to get more information on the individual file system commands.
The list of directories available can change depending on which message
board is active when the FILES command is given. Individual directory lists
are provided as a SYSOP-configurable option.