Bug#255651: base-config: apt-config should ask for proxy if not configured

[Christian Perrier <bubulle@debian.org>]

Package: base-config
Version: 2.31
Severity: normal

When using the netinst CD, the HTTP or FTP proxy is never prompted to the
user, even at low priority.

Thus, when apt-config comes for, for instance getting the security updates,
no proxy is setup and if one is needed for reaching the outside world, the
security updates fail.

I suggest asking for the proxy information if none has been inherited from
1st stage.

-- System Information:
Debian Release: testing/unstable
  APT prefers unstable
  APT policy: (500, 'unstable'), (500, 'testing')
Architecture: i386 (i686)
Kernel: Linux 2.6.6-1-686
Locale: LANG=fr_FR.UTF-8, LC_CTYPE=fr_FR.UTF-8 (ignored: LC_ALL set to fr_FR.UTF-8)

Versions of packages base-config depends on:
ii  adduser                 3.57             Add and remove users and groups
ii  apt                     0.5.25           Advanced front-end for dpkg
ii  aptitude                0.2.14.1-2       curses-based apt frontend
ii  bsdutils                1:2.12-7         Basic utilities from 4.4BSD-Lite
ii  console-data            2002.12.04dbs-42 Keymaps, fonts, charset maps, fall
ii  console-tools           1:0.2.3dbs-52    Linux console and font utilities
ii  debconf                 1.4.28           Debian configuration management sy
ii  debianutils             2.8.3            Miscellaneous utilities specific t
ii  gettext-base            0.14.1-2         GNU Internationalization utilities
ii  passwd                  1:4.0.3-28.4     Change and administer password and

-- debconf information excluded