-$ConfVars->{CgiDir} = 2;
-$ConfVars->{InstallDir} = 2;
-$ConfVars->{CgiImageDir} = 2;
+$ConfVars->{CgiDir} = 2;
+$ConfVars->{InstallDir} = 2;
+$ConfVars->{CgiImageDir} = 2;
+
+#
+# These config parameters are used in the code to be backward compatible,
+# but are not present in the current config file, so ignore them.
+#
+$ConfVars->{BlackoutHourBegin} = 2;
+$ConfVars->{BlackoutHourEnd} = 2;
+$ConfVars->{BlackoutWeekDays} = 2;
+$ConfVars->{RsyncLogLevel} = 2;
+