Bug#472215: exim4-daemon-light: Fails on postrm on removal

[Rudy Godoy]

Package: exim4-daemon-light
Version: 4.69-2
Severity: important

When trying to remove exim4-ligth-daemon to install postfix,
the postrm target fails rendering the system in a bad state
for subsequent installs/upgrades.

Probably this is related to #449287 and #453958. The output
is this (Spanish):
...
Desinstalando exim4-daemon-light ...
 * Stopping MTA                                                                 
/sbin/start-stop-daemon: warning: failed to kill 3150: No such process
invoke-rc.d: initscript exim4, action "stop" failed.
dpkg: error al procesar exim4-daemon-light (--remove):
 el subproceso pre-removal script devolvió el código de salida de error 
3
Se encontraron errores al procesar:
 exim4-daemon-light
E: Sub-process /usr/bin/dpkg returned an error code (1)
Un paquete no se pudo instalar. Intentado recuperarse:
Leyendo lista de paquetes... Hecho                   


-- Package-specific info:
Exim version 4.69 #1 built 30-Jan-2008 14:40:24
Copyright (c) University of Cambridge 2006
Berkeley DB: Berkeley DB 4.6.21: (September 27, 2007)
Support for: crypteq iconv() IPv6 GnuTLS move_frozen_messages
Lookups: lsearch wildlsearch nwildlsearch iplsearch cdb dbm dbmnz dnsdb dsearch nis nis0 passwd
Authenticators: cram_md5 plaintext
Routers: accept dnslookup ipliteral manualroute queryprogram redirect
Transports: appendfile/maildir/mailstore autoreply lmtp pipe smtp
Fixed never_users: 0
Size of off_t: 8
Configuration file is /var/lib/exim4/config.autogenerated
# /etc/exim4/update-exim4.conf.conf
#
# Edit this file and /etc/mailname by hand and execute update-exim4.conf
# yourself or use 'dpkg-reconfigure exim4-config'
#
# Please note that this is _not_ a dpkg-conffile and that automatic changes
# to this file might happen. The code handling this will honor your local
# changes, so this is usually fine, but will break local schemes that mess
# around with multiple versions of the file.
#
# update-exim4.conf uses this file to determine variable values to replace
# the DEBCONFsomethingDEBCONF strings in the configuration template files.
#
# Most settings found in here do have corresponding questions in the
# Debconf configuration, but not all of them.
#
# This is a Debian specific file

dc_eximconfig_configtype='satellite'
dc_other_hostnames='luna'
dc_local_interfaces='127.0.0.1'
dc_readhost='luna.htu.pe'
dc_relay_domains=''
dc_minimaldns='false'
dc_relay_nets=''
dc_smarthost='smtps.americatelnet.com.pe'
CFILEMODE='644'
dc_use_split_config='false'
dc_hide_mailname='true'
dc_mailname_in_oh='true'
dc_localdelivery='mail_spool'
mailname:luna

-- System Information:
Debian Release: lenny/sid
  APT prefers unstable
  APT policy: (500, 'unstable')
Architecture: powerpc (ppc)

Kernel: Linux 2.6.24-1-powerpc
Locale: LANG=es_PE.UTF-8, LC_CTYPE=es_PE.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/bash

Versions of packages exim4-daemon-light depends on:
ii  debconf [debconf-2.0]         1.5.20     Debian configuration management sy
ii  exim4-base                    4.69-2     support files for all Exim MTA (v4
ii  libc6                         2.7-9      GNU C Library: Shared libraries
ii  libdb4.6                      4.6.21-6   Berkeley v4.6 Database Libraries [
ii  libgnutls13                   2.0.4-3    the GNU TLS library - runtime libr
ii  libpcre3                      7.6-2      Perl 5 Compatible Regular Expressi

exim4-daemon-light recommends no packages.

-- debconf information:
  exim4-daemon-light/drec: