Bug#54708: base-config: upgrade using debconf cleared my package lists

[dwitch <ydirson@altern.org>]

Package: base-config
Version: 0.02
Severity: important

The current debconf files have the following problems when applying to
an existing install:

- only one source is configurable
- if the ppp link to the net is down, then all package lists are
removed while the connexion attempts fail - "apt-get dselect-upgrade"
is then confused, believing it has nothing to do, although the package
spool is full ...

At the very least the user should be warned of those problems in the
extended desc of the package

-- System Information
Debian Release: potato
Architecture: i386
Kernel: Linux bylbo 2.2.13 #1 ven déc 10 20:59:19 CET 1999 i586

Versions of packages apt depends on:
ii  libc6                         2.1.2-11   GNU C Library: Shared libraries an
ii  libstdc++2.10                 1:2.95.2-4 The GNU stdc++ library