deprecate ftp-proxy in favor of ftp/pftpx

The two main tools most users appear to use for FTP, viz ftp
and firefox, do not work well with ftp-proxy any more.  While
ftp can be configured to work, firefox cannot.  The problem is
that ftp-proxy only supports active mode connections and firefox
only supports passive ones.  Ftp, itself, defaults to passive
(or even epsv4) and has to be configured to default to active.

The port ftp/pftpx is an alternate FTP proxy which handles
passive and epsv4 just fine.

Is it time to deprecate ftp-proxy and elevate ftp/pftpx to the
base system and recommend its use instead?

	-jr