brutalize postfix to get rid of the last of the hostname occurances

livecd.sh

@@ -204,7 +204,10 @@ deb-src http://security.ubuntu.com/ubuntu ${STE}-security main restricted
     rm -f ${ROOT}var/lib/apt/lists/*_*
     rm -f ${ROOT}var/spool/postfix/maildrop/*
     chroot $ROOT apt-get update || true	# give them fresh lists, but don't fail
-    rm ${ROOT}etc/resolv.conf
+    rm ${ROOT}etc/resolv.conf ${ROOT}etc/mailname
+    sed -i '/^myhostname/d; /^mydestination/d' ${ROOT}etc/postfix/main.cf
+    echo set postfix/destinations | chroot ${ROOT}/usr/bin/debconf-communicate postfix
+    echo set postfix/mailname | chroot ${ROOT}/usr/bin/debconf-communicate postfix
     chroot ${ROOT} dpkg-query -W --showformat='${Package} ${Version}\n' > livecd.${FS}.manifest
 
     mkdir -p livecd.mnt