It should connect to the proxy URL, log in as username@target-site,
and continue as usual.
-* -p should probably go "_two_ more hops" on <FRAMESET> pages.
-
* Add a --range parameter allowing you to explicitly specify a range of bytes to
get from a file over HTTP (FTP only supports ranges ending at the end of the
file, though forcibly disconnecting from the server at the desired endpoint