Bug#305619: dpkg: Check MD5SUM of a package's non-config files and query user about replacing changed files.

[Chris Dos <chris@chrisdos.com>]

Package: dpkg
Version: 1.10.27
Severity: important

It would be prudent if dpkg check the md5sum of a system file and
questioning the user if they want it replaced, rather than just
replacing the file without checking.  

Examples:

Squirrelmail:  I've changed the Squirrelmail login graphic and modified
the HTML to specify how to log into the mail server.  Upon upgrading
Squirrelmail, these two files get over written and no backups were made.

Hylafax: I've modified the fax receive script to print out all incoming
faxes.  Upon upgrading, this script gets over written and no backups
were made.

-- System Information:
Debian Release: 3.1
  APT prefers unstable
  APT policy: (990, 'unstable')
Architecture: i386 (i686)
Kernel: Linux 2.6.10
Locale: LANG=en_US, LC_CTYPE=en_US (charmap=ISO-8859-1)

Versions of packages dpkg depends on:
ii  dselect                     1.10.27      a user tool to manage Debian packa
ii  libc6                       2.3.2.ds1-21 GNU C Library: Shared libraries an

-- no debconf information