fix the real problem: add postfix to the sasl group in postinst, so that we don't need postfix in pre-depends

debian/control

@@ -8,8 +8,7 @@ Standards-Version: 3.7.2.1
 
 Package: alternc
 Architecture: all
-Pre-Depends: postfix
-Depends: debianutils (>= 1.13.1), debconf (>= 0.5.00) | debconf-2.0, libapache-mod-php4 | libapache-mod-php5, apache, apache-ssl, courier-ssl, courier-imap-ssl, courier-pop-ssl, mysql-server, php4-mysql | php5-mysql, phpmyadmin, proftpd-mysql, squirrelmail, postfix-tls, bind9, wget, rsync, quota, courier-authmysql, ca-certificates, locales, perl-suid, perl, postfix-mysql, wwwconfig-common, sasl2-bin, libsasl2-modules, php4-cli | php5-cli, lockfile-progs (>= 0.1.9), gettext (>= 0.10.40-5), pdksh (>= 5.2.14-6), adduser
+Depends: debianutils (>= 1.13.1), debconf (>= 0.5.00) | debconf-2.0, libapache-mod-php4 | libapache-mod-php5, apache, apache-ssl, courier-ssl, courier-imap-ssl, courier-pop-ssl, mysql-server, php4-mysql | php5-mysql, phpmyadmin, postfix, proftpd-mysql, squirrelmail, postfix-tls, bind9, wget, rsync, quota, courier-authmysql, ca-certificates, locales, perl-suid, perl, postfix-mysql, wwwconfig-common, sasl2-bin, libsasl2-modules, php4-cli | php5-cli, lockfile-progs (>= 0.1.9), gettext (>= 0.10.40-5), pdksh (>= 5.2.14-6), adduser
 Recommends: libapache-mod-gzip
 Conflicts: alternc-admintools, alternc-awstats (<= 0.3.2), alternc-webalizer (<= 0.9.4)
 Provides: alternc-admintools

debian/postinst

@@ -38,6 +38,9 @@ update_var() {
 case "$1" in
   configure)
 
+    # ajoute l'user postfix au groupe sasl
+    adduser --quiet postfix sasl
+
     # build local.sh if it does not exist
     if [ ! -f $CONFIGFILE ]; then
         cat > $CONFIGFILE <<EOF

debian/preinst

@@ -6,8 +6,6 @@ set -e
 
 case "$1" in
   install)
-    # ajoute l'user postfix au groupe sasl
-    adduser --quiet postfix sasl
     ;;
 
   upgrade)