How to use?
        For gettin' opt.tgz from fli4l use

        ./flicp -u <userpw> -a <adminpw> -r <rootpw> fli4l:/boot/ opt.tgz

        -u and -a are optional, but are required if admin/user pw is set.
        -r is always required to get/send any file to/from fli.


        To send a new opt.tgz to fli4l

        ./flicp -u <username> -a <adminpw> -r <rootpw> opt.tgz fli4l:/boot

        Of course /boot must be writeable.


For the future:
        Set another remote filename.