Set the hostname on /etc/hosts for debian boxes in case it is not set

For some reason Squeeze does not add that for us

boxes/debian/lxc-template

@@ -66,6 +66,13 @@ EOF
 $hostname
 EOF
 
+    # set the host in case it is not set so that sudo does not complain about the host
+    if ! (grep -q $hostname $rootfs/etc/hosts); then
+      chroot $rootfs sed -i -e \
+          "s/^127.0.0.1\(\s\+\)localhost$/127.0.0.1\1localhost\n127.0.0.1\1${hostname}/g" \
+          /etc/hosts >/dev/null 2>&1 || true
+    fi
+
     # set default locale
     cat <<EOF > $rootfs/etc/locale.gen
 en_US.UTF-8 UTF-8