bundles/apt: fix logging for upgrade-and-reboot

bundles/apt/files/upgrade-and-reboot

@@ -3,17 +3,15 @@
 # With systemd, we can force logging to the journal. This is better than
 # spamming the world with cron mails. You can then view these logs using
 # "journalctl -rat upgrade-and-reboot".
-if [[ "$1" != '-w' ]]
+if which logger >/dev/null 2>&1
 then
-    if which systemd-cat >/dev/null 2>&1
-    then
-        if [[ "$1" != "is-logging" ]]
-        then
-            exec systemd-cat -t upgrade-and-reboot "$0" is-logging "$@"
-        else
-            shift
-        fi
-    fi
+    # Dump stdout to logger, which will then put everything into the
+    # journal.
+    exec 1> >(logger -t upgrade-and-reboot -p user.info)
+
+    # Make stdout and stderr the same. We don't care about the
+    # distinction anyway.
+    exec 2>&1
 fi
 
 statusfile="/var/tmp/unattended_upgrades.status"