busybox

ftpget/put: make 3rd parameter optional

function                                             old     new   delta
packed_usage                                       26728   26738     +10
ftpgetput_main                                       343     351      +8

Signed-off-by: Vladimir Dronnikov <dronnikov@gmail.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>