A QWKnet-FTP client written in JS, thanks in large part to Deuce's load/ftp.js

This needs testing and validation feedback, ASAP, as it's mere existence in
the exec directory means that it'll usurp qnet-ftp.bin (!) and if it doesn't
work, our precious QWKnets will suffer. :-/

... Another (rather large) nail in Baja's coffin.