Better argument handling

when run it yields the following
./autoftp3.py -x
autoftp [-v][-p][-h]

When is a module not a module?
it is often useful to create a module
for yourself and others to use in the future
to subdivide the large problem set into a number
of smaller modules
sometimes a module might be able to operate as a
stand alone program
consider autoftp could be organised as a module