[issue848] bin-install test

[YONETANI Tomokazu]

> but apparently our ftp command drops to an interactive prompt instead of
> giving us the list if theURL is an ftp one.  So if we use ftp server
> for one of our bin-install sources, we need to port the fix from
> NetBSD as their command does the job unlike ours.

Sorry, the same thing happened to NetBSD version; probably I made a pasto
when I was trying wget or curl:

  $ ftp -o - ftp://ftp.dragonflybsd.kiev.ua/pub/DragonFlyBSD/packages/DragonFly-1.10.1/i386/All/
  Connected to ftp.dragonflybsd.kiev.ua.
  220 Welcome to ftp.h0.org.ua FTP service.
  331 Please specify the password.
  230 Login successful.
  Remote system type is UNIX.
  Using binary mode to transfer files.
  200 Switching to Binary mode.
  250 Directory successfully changed.
  250 Directory successfully changed.
  250 Directory successfully changed.
  250 Directory successfully changed.
  250 Directory successfully changed.
  250 Directory successfully changed.
  ftp>