Bug#123144: Should allow setting of proxy FTP over HTTP in apt.conf

[Petter Reinholdtsen <pere@hungry.com>]

Package: apt
Version: 0.5.4
Severity: wishlist

The manual page for apt.conf reads:

  It is possible to proxy FTP over HTTP by setting the ftp_proxy
  environment variable to a http url - see the discussion of the http
  method above for syntax. You cannot set this in the configuration
  file and it is not recommended to use FTP over HTTP due to its low
  efficiency.

I would like to proxy FTP over HTTP, and would like to update
/etc/apt/apt.conf.d/* instead of using the environment variable.  I
want the two ways of configuring an FTP proxy to work the same way,
making it possible to use

  Acquire::ftp::Proxy "http://proxy:3128/";;

instead of having to change the enviroment.