from shorewall.conf instead of /bin/sh
--- /dev/null
+diff -ur shorewall-5.2.0.4.orig/shorewall-5.2.0.4/Perl/Shorewall/Config.pm shorewall-5.2.0.4/shorewall-5.2.0.4/Perl/Shorewall/Config.pm
+--- shorewall-5.2.0.4.orig/shorewall-5.2.0.4/Perl/Shorewall/Config.pm 2018-05-18 18:46:49.000000000 +0000
++++ shorewall-5.2.0.4/shorewall-5.2.0.4/Perl/Shorewall/Config.pm 2018-06-20 12:32:04.348554961 +0000
+@@ -6250,10 +6250,10 @@
+ $have_capabilities = 1;
+ }
+
+- get_params( $export );
+-
+ process_shorewall_conf( $update, $annotate );
+
++ get_params( $export );
++
+ ensure_config_path;
+
+ @INC = @originalinc;