Bug#435952: update-exim4.conf: non-ascii value when '+' sign is used

[alexandre-francois at voila.fr]

Package: exim4-config
Version: 4.67-7
Severity: important

I need to declare other destinations (for which mail is accepted) as a variable list and I use the following line in debconf :
  dc_other_hostnames='+virtual_domains'

When restarting exim4, I got the following error :
  /usr/sbin/update-exim4.conf: non-ascii value +virtual_domains read from /etc/exim4/update-exim4.conf.conf, sanitizing to _virtual_domains

I could be great to allow the '+' char in the check_ascii_pipe() function of update-exim4.conf.

-- Package-specific info:
Exim version 4.67 #1 built 14-Jul-2007 09:33:31
Copyright (c) University of Cambridge 2006
Berkeley DB: Sleepycat Software: Berkeley DB 4.3.29: (September  6, 2005)
Support for: crypteq iconv() IPv6 PAM Perl GnuTLS move_frozen_messages Content_Scanning Old_Demime
Lookups: lsearch wildlsearch nwildlsearch iplsearch cdb dbm dbmnz dnsdb dsearch ldap ldapdn ldapm mysql nis nis0 passwd pgsql sqlite
Authenticators: cram_md5 cyrus_sasl dovecot plaintext spa
Routers: accept dnslookup ipliteral iplookup manualroute queryprogram redirect
Transports: appendfile/maildir/mailstore/mbx 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='smarthost'
dc_other_hostnames='+virtual_domains'
dc_local_interfaces=''
dc_readhost=''
dc_relay_domains=''
dc_minimaldns='false'
dc_relay_nets='192.168.1.0/24'
dc_smarthost='smtp.wanadoo.fr'
CFILEMODE='644'
dc_use_split_config='true'
dc_hide_mailname='false'
dc_mailname_in_oh='true'
dc_localdelivery='maildir_home'
dc_headers_rewrite='*@+virtual_domains   ${lookup{$1}lsearch{CONFDIR/email-addresses-atelier}{$value}fail}'
dc_return_path='${if match_domain{${domain:$return_path}}{+virtual_domains}{${lookup{${local_part:$return_path}}lsearch{CONFDIR/email-addresses-atelier}{$value}fail}}fail}'
mailname:atelier

-- System Information:
Debian Release: lenny/sid
  APT prefers testing
  APT policy: (500, 'testing')
Architecture: i386 (i686)

Kernel: Linux 2.6.18-4-686 (SMP w/2 CPU cores)
Locale: LANG=en_US, LC_CTYPE=en_US (charmap=ISO-8859-1)
Shell: /bin/sh linked to /bin/bash

Versions of packages exim4-config depends on:
ii  adduser                       3.104      add and remove users and groups
ii  debconf [debconf-2.0]         1.5.13     Debian configuration management sy

exim4-config recommends no packages.

-- debconf information:
  exim4/dc_noalias_regenerate: false
* exim4/dc_smarthost: smtp.wanadoo.fr
  exim4/dc_relay_domains:
* exim4/dc_relay_nets: 192.168.1.0/24
* exim4/mailname: atelier
* exim4/dc_localdelivery: Maildir format in home directory
* exim4/dc_local_interfaces:
* exim4/dc_minimaldns: false
  exim4/exim3_upgrade: true
* exim4/dc_other_hostnames: +virtual_domains
* exim4/dc_eximconfig_configtype: mail sent by smarthost; received via SMTP or fetchmail
  exim4/no_config: true
* exim4/hide_mailname: false
* exim4/dc_postmaster: alex
* exim4/dc_readhost:
* exim4/use_split_config: true
  exim4/exim4-config-title: